Which playermodel Creator should I use?

hi this is my first time posting a thread on the Four Tops so please excuse this is one place or what not but I have a question: Which player modelmaker is good. The reason why is because I’m actually going to start making my own game after a few years of learning how to code in Unity’s engine. I’ve been able to figure out how to make models using the engine but I couldn’t figure out how to correctly make playermodels. If you have an suggestion for me I’ll be glad to hear. Plus (you don’t have to) I would like tips on using the Linux engine for unity.
Thanks,
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I also want to add that I am using Ubuntu for unity. should I use a different Linux version?