I need opinions about how to get clients

Hi, im making some test for find new clients, and this is my experience:

Case 1:
upwork: i made 4 o 5 jobs but they want pay 50 usd or less, they ask for example for install a wordpress, plugins and some particular design and allways they ask for a extra task.

Yesterday one "client" request me all this tasks:
Task ASO
Keyword Analysis
Competitor Research
SEO App Title/Subtitle
Keyword Optimization
Keyword Localisation
App Landing Page
App Store Submission
App radar access

for 300$ and i reject the offer because he also want use my developer account for upload the app.

Case 2:
Landing page + facebook ads.
I get some contacts, like 8 whatsapp messages asking for prices for 18 usd with 0 sales, my cheap product is 95$ and for latin america now is expensive, i understand but later i see a lot of people buying websites ugly, for example one person sendme a their actual website, if i click on the Contact button i get redirected to a ong website.

Case 3:
I receive one offer via linkedin, the client ask for a review of a website, for a 3º person, one importer in mexico, i send the review and offer in usd with detailed task one by one . The client askme why i send the offer in usd, he want pay in pesos from argentina, and i must pay the taxes... so i reject the offer. (this week the ars gone from 80 to 110, so i can't work in pesos)

Maybe im aproaching this bad? Anyone has experience with this type of situations, advices?

Thanks for reading