>> I suspect the practise does factor in a lot. English and Creative Writing were never one of the subjects that held my interest in school, so I didn't write much outside of what was required. <<

Then pick something that encourages you to write, if it's something you'd like to practice. A blog post per day, a short poem or a page of fiction per day, bingo challenges, whatever works for you.

>> I have a stronger aptitude for math and science, <<

Then by all means, start there. I enjoy reading and writing stuff based on scientific discoveries. Planar geometry can go to some really interesting places. There isn't as much SF actually based on science as there used to be, alas. We could sure use more of that.

>> and most of my artistic creativity swings more towards crafts than typical arts or writing.<<

Also totally fine. You can always play bingo with those.

>> Practise writing would probably help, along with constructive feedback I think.<<

I'll try to chip in what I can.

>> And you've posted some great resources for writing, so looking at those would give me a starting place for improving too.<<

Yay! I'm happy I could help.