Where to invest $2-5k?

I'm looking to invest 2-5k online. Any suggestions?
So far I've tried:
Affiliate marketing with clickbank and native ads, got 1.3k in commission a few months ago but wasn't profitable.
Push ads with CPA offers. Another 1k wasted.
Shopify dropshipping with AliExpress and TikTok ads. Looked promising but I quit quite early. Sold 3 hair brushes and 1 shower head. I just wasn't sure if I was doing right so I gave up.

What is the area where you're the best? If it's CPA - go there.
If it's website creation - do that
simply