My advice is to just do it and figure it out from there. If you’re at least moderately tech-savvy and you’re willing to look up how to do things, you’ll be fine. The installation process is painless.
Think of the software you use on Windows, and then look up if a Linux version is available. Failing that, odds are pretty good that there’s a FOSS alternative to replace it.
Each distribution has a built-in package manager that gives you access to tons of software. The majority of the free software that you’ll want to use will probably be available from there.
Quick edit: The Linux community is truly supportive, and you’ll pretty much always find someone somewhere willing to help you figure things out.