About to launch - what have you tried that's worked really well for early growth?

We're getting ready to launch RankCaddy (https://rankcaddy.io/) at the end of the month. I'm trying to prepare for launch but feel like I'm winging in in some ways.

We've largely been focusing on the product and using feedback from a small group of beta testers to improve and tweak.

Here's what we have planned leading up to and after launch:

• I am going to push to my social channels, leading up to and during launch day. I don't have a big audience but doing this is pretty standard I guess.
• I am planning on setting up a Product Hunt page. I did approach a seasoned hunter as I thought getting them to post it might result in more traction. I haven't heard back though. Any thoughts on this?
• I'll probably post on other channels such as Hacker News and Reddit but don't use these much usually.
• I am planning on doing a lot more useful videos/lives with helpful advice and tips, featuring the tool.
• A big target for us is freelancers so post-launch, I will be outreaching to freelancers via LinkedIn. I'll probably approach with a Facebook group invite first before later offering a discount or extended free trial.
• We are sponsoring an industry event in early April. We're just doing a flyer drop in the delegate bags (3.5k attendees) and offering an exclusive, time limited discount. I'll be attending the event too.
• After all the above, we may look at trying some ads (FB/Insta/TikTok/Google).
• I have also approached a few popular accounts on TikTok but only heard back from 1 of 5 (and they wanted a big lump of cash).

I think the outreach will be a big part of growth for us but I can't help feeling like I'm missing loads of other opportunities.

Any ideas?

What have you tried that's worked really well for your early growth?

Thanks.