Answering the thread title plainly, "I (you) continue striving to improve"
Getting deeper into the post content, I think that it's absolutely never too late to start! Try not to fret about starting to learn a skill later in life (or picking back up an old one to practice). No two people's journey is the same, and just because someone starting writing novels or making comics in elementary school doesn't exclude you from starting now.
Especially considering your most recent reply:
I think that you can definitely find a way to continue creating that works for you and your life style As others have stated, turning art into a career is a massive undertaking and rather difficult, so if that was the only motive then... choosing to forego it and pursue a different hobby might make sense, especially if financial stability was a concern. BUT if money is secondary/not a factor then there's nothing holding you back from having a blast and making great content as a hobby that might blossom into something more later on!
I'm not in an entirely comparable situation, but I would say our motives for creating are similar. I'm in my late 20's and single, but work full time and just pursue comics as a "serious hobby'. It's not something that I ever see becoming a career, but I'm dedicated to continuing to hone my craft and wouldn't mind finding a large readership someday~
I think the two tips/pieces of advice that I would give are the following:
1.) Take it at your own pace. As you get older and have more familiar/work commitments, it's understandable that you won't have as much time to pour into a hobby like this as someone younger, necessarily. But that's not a problem~ Don't extend yourself beyond your means and just create what you can, when you can. Sure you might not post a webnovel chapter every day or 2 or finish a whole comic update in a week like some folks can, but that shouldn't stop you from making them if you want to! Better to make something slowly than nothing at all.
2.) Work smarter, not harder- look for ways to maximize what time you do have. When practicing, try to be really focused on areas that you want to improve rather than letting your pencil or keyboard wander. Try not to be shy about asking your peers for feedback or questions, rather than trying to work things out on your own. If you're worried about how long it might take to complete a huge epic, especially at a slower pace, maybe consider taking on small-to-medium projects instead where you can see the light at the end of the tunnel. Things like this. Of course it's up to you to decide what you want to do, but finding ways to maximize output with minimal time is a valuable skill
You'll have to discover your own goals, of course, but hopefully you'll be able to find your groove and make lots of great stories!