First novels are always a pain in the butt! I remember mine well. Still have them on file. But I’ve a lot since then and now first books aren’t such a problem for me. What challenges me–sometimes–is breaking through that glass ceiling into new territory with future books (like my Demon Blade novel) and realizing that a lot has changed in the years since I began Book 1.
So I feel your pain on the typos and such. I spent a lot of time–on the side–doing “clean up” of my manuscripts because I hate a typo/mistake filled novel. So I edit as I go, and then go back and do some further touch ups.