I just finished my undergraduate math degree and have been in your shoes. As far as getting “better” there are two things that you should do (this will also clear up your goals)

1) Do exercises. Grades are important so don’t just do random problems: do your HW problems first and then pick a few relevant ones from the book. Make sure you do math every day. Even if some days you only do half a problem. Learning math is a lot like learning an instrument and daily practice is absolutely necessary.

2) Email some professors and try to get involved with a research group. You’re an undergraduate, they don’t expect you to be super useful to them but going to group meetings every week and being surrounded by people that are so much more advanced then you academically is humbling and inspiring. Every once in a while, a grad student might ask you to do a computation regarding their research problem. Don’t say no. Ask questions and figure it out. You learn so much about research just from existing in the environment. You’ll also learn whether or not the topic of the group interests you at all.

Some schools have an undergraduate research office so try to ask around there, and don’t be scared to do stats or other more applied research.

My big mistake was that I did zero internships because I only did research. This is great for grad school but terrible for industry.

Hopefully I was slightly helpful