12 years ago I needed professionals a lot. Now I need them a lot less. They are still handy but not for what I've learned to do.
I'm a quick study and willing to take the risk. In time ( over twelve years) I got to the point where I can do most plumbing, carpentry, rough and finish, a goodly chunk of electrical, drywall and even laid my first sheet vinyl floor with pattern, lined up and right. I'm to the point where I can actually start charging for stuff but just don't want to yet. (I also used to like computers too until I got paid to be a network operator. Now I can just barely stand em'.)
Do what you know, then ask lots of questions. No such thing as a stupid question. A lot of good people here willing to help. Just keep asking questions. Take classes if you can. Free ones at your local big box, also continuing adult education, courtesy of your local public schools and community colleges.
Safety first, last and always. I have scar tissue from being stupid. Be smart. Measure twice, cut once...with safety goggles and hands well away from the blade.
DIY is what's it's all about. Everyone starts out knowing little and or nothing and then learns. Learning is what it's all about.
Of course I'm a hard case. I only seek professional assistance when I'm on fire and sunk.