How do I take on new hobbies?

There's a lot of stuff that I wanna learn how to do. Skating, working out, speaking Spanish, etc. But, I don't really have a plan in mind to do those things. Not to mention the voice in the back of my head telling me "those require you to adhere to a routine, and you're not good at that". I know I should just ignore that voice, but it's a lot easier said than done. Because that was the message I got from my mom before she died; that I'm too dumb and too broken to actually become the person I want to be. I don't know what advice you could give me here, but I'm just glad I got this off my chest.