Who can suggest a better UI

first thing, please share the link on a platform were people can comment on it :-)
for here we go:

• bit more colour , overall i felt its a mock up.
  -increase the size of the imagines, looks small.
  -that laptop pics looks so fake , its not good for the first impression.
  that all the comes to mind on the spot. M not ur potential client so take my comment with a pinch of salt. Better talk to people face to face. specially ur customer

-change logo, it does not fit your site design, color scheme
-"Manage Happy People." - so it's only for happy people?
-"Running a business, a church, a fellowship, a group, an association or an event" ...a class, a symposium, a course... To much text and I still do not know what the hell is this. Use synonym to match all of them in one word.
-"means that you are dealing with People (-_-)." - OK, I just spent 5 seconds on your website and I do not know what you are doing or offering. You state obvious, and apparently, your tool is to somehow manage happy people. But I do not know that yet for sure. This is the moment when the first wave of users will click "back" and search for something else.
-"Membersdrive is a CRM that help you effectively keep, manage and grow happily with your people." - ah OK, so why the heck this is not the first line in header?! I still do not know the meaning of all of this, but at least I know what CRM is. So it is CRM that allows me to "keep people" (???), "manage people" and "grow happily" (???).
-" NEW: Introducing Personalization on Membersdrive." - cool, I still do not know what this tool is, besides that, it is some kind of CRM. The quoted information is non-informative to me.
-"10,000 and Counting." - 10,000 of what? What counting?
-"Managing 10,000+ people for growing busineses and organizations." - is this a lot? So is this tool for businesses that are growing? I still don't know, because I scanned the whole header and I have no meaningful information on what is this tool (just pieces like CRM, growing, happy). But I simply cannot make anything that makes sense from this.
There is also an image that gives me absolutely no sense of what I am looking at, the writing is too small so I won't even try.
...and this is when your average user quits unless he has some extra free time or he knows what your tool does because someone told him.
Landing pages are hard. Much harder than 90% of Indie Hackers imagine. One word can change your conversion by 0.1-0.5%. Your landing page is not terrible, but I would assume it can halve your conversions comparing to optimized version.

• Nice clear landing with message and image above the fold - gives a great impression of the site.
• Add a br tag between your first and second paragraph. "Membersdrive" should have more space or at least add more padding to both.

• Membersdrive is a CRM that help you effectively keep, manage and grow happily with your people. => Membersdrive is a CRM that helps you effectively keep, manage and grow happily with your people.

• "Your people" This is confusing language. I'm not sure what you mean by "My people" -- is it the people I work with? Is it my wife? Is it my friends? Is it my customers? My clients? Who are we talking about?
• The image on the right is very blurry -- I'd hope that if it's small.. you'd make it so I could click and it would open in a Lightbox. Otherwise, make it bigger and more clearer. (I'm at 100% zoom)

• I am glad to find the Membersdrive team, as a fellowship, relationship is the core part of our activities and Membersdrive is very useful for our fellowship goal. => I am glad to have found the Membersdrive team, as a fellowship, relationship is the core part of our activities and Membersdrive is very useful for our fellowship goal. (You wouldn't believe it if I told you, but proper and good English builds more trust than English that sounds off)

• Testimonials should really go at the bottom
• Lose the "Enter username" Log in button at the top. Maybe put a Login button up there and take your customers to a page instead or a popup login?

• Create unlimited table to manage different informtaion groups. => Create unlimited tables to manage different information groups.

• I click Communication on the menu up top and it doesn't work.

I could go on and on... but you really need to look it over. Fix spelling mistakes. Make sure it "reads" well. Get a native English speaker to read over your website. Make sure buttons actually work.

Get your mom to visit your website and then ask her if she'd be interested in using your product.