I'd strongly recommend against a platform like Fiverr. I spent some time doing various odd DevOps and Linux jobs on there. I basically had to charge next to nothing for my services because the sheer amount of other people doing the same thing (probably to a very low standard). Despite this I thought building up my reviews would be a good way to increase my prices and still get work on there, which it was. Unfortunately the attitude of quite a large percentage of the people who hired me was just absurd. Difficult language barriers in many cases, endless disputes over deliverables, constantly changing requirements and even some cases blaming me for things completely out of my control. What I was hoping would eventually lead to a nice little side business of odd sysadmin type things just made me really stressed and frustrated and I realised why I work for a company where there's a barrier between me and the end user and their insane demands.

Those platform are pretty bad unless you are a beginner or you're into a very specific niche.

I started on those platforms and I couldn't scale up my rate well enough as without those platforms.

At the same time I know a few crypto devs who built their reputation there and can get good rates.

For high paid normal web development, nothing beats a good network of wealthy companies who constantly need crap done.