I'm not sure how similar it is to OnShape as I have never used it but I'm sure the basics would be intuitive. There are tons of Solidworks tutorials on YouTube. I even have to reference them sometimes if I need to do something that I have never done before. Even after 17 years I have not come close to using SW to it's fullest potential.I've been meaning to teach myself Solidworks for a while. I have just never got around to it. It is also free for students and I have it downloaded, but I just need to give myself some time for me to learn it.