Go - Weiqi - Baduk

You play very calmly and patiently, which is good. I like that you are able to create heaviness, and you do make some good invasions and defend well.

Early on, though, you played very slowly and defensively, opting to consolidate territory on the top and bottom sides rather than attacking the corners strongly and weakening and dividing white. Additionally, your slow and heavy style allowed white to build up some very large moyo. Ultimately, I think being more aggressive, prioritizing the corners, and considering what the biggest/most valuable moves are will help you.

Here's an example of how playing defensively (slowly) actually loses you maybe like 20+ points. By playing K16 on move 13 instead of truly approaching the corner, you avoid any possibility of complications or a pincer, etc. but if you'd just played F17 instead, you'd have limited White's control of the top left corner, played out some moves to make your shape good, and then backed off to like K16 to claim the side. So you'd have achieved the same goal (control of top side) without ceding a large area to white and allowing them to take more of that top side than the faster, less defensive method of just approaching the corner directly. In this case, offense is the best defense.

You mentioned maybe getting too preoccupied with theory, but I think learning a couple common joseki might help you understand opening theory a bit better and help you be aggressive in a way that still allows you to make good shape and stay safe. You don't need to always play established joseki, but understanding why they work is beneficial.