If this advice is strictly for Newbies only then it's just a lot easier and safer to follow popular bounty managers like bounty detective, bubbalex, arteezy, Hhampuz, etc, and make sure you do research, the use case for each bounty project is the most important
I agree with your advice. For newbies, it's best to take a look at these worthy managers and get involved in the projects they lead. You do not need to register in a large number of projects, but first you need to participate in several projects. I say this from my own experience. There was a time when I was involved in 30-40 projects, and half of them were of poor quality, but now I am involved in 3-5 projects led by Bounty Detective and Bubbalex, and I am very pleased with the result.