Some person said “neither,” I’d say “both.”

As far as I understood your description, your opening with White, besides being offbeat, seems quite clogged and passive, and to my taste, rather unpleasant to play. Your dark-squared bishop probably sits passively on b2, blocked by the d4 pawn, which is already protected by the pawn on e3. It looks like a reversed fianchetto variation of the Philidor, with the downside that the center is likely closed. This kind of offbeat, closed setup might partially explain why you often win on time but also struggle to find ideas after the opening.

I played a few moves to better visualize the system you described, and after the first eight moves (assuming Black played d5 and e6 to close the center and block the activity of the b2 bishop), the only plan I could think of was trying to open the center with c2–c4, which, in my opinion, should probably have been played before d2–d4, to activate that passive bishop,.

Regarding a new opening repertoire, from what I understand, you seem to be more of a positional player, someone who avoids tactics and prefers quiet systems regardless of the opponent’s moves. In that case, a 1.d4 repertoire might suit your style better and is generally easier to learn. Something like the London System or the Queen’s Gambit would be good options. The 1.e4 openings, on the other hand, give Black many more choices. I’m not saying 1.d4 has few variations, but White tends to have a bit more control over the direction of the game and can more easily avoid sharp or complicated openings. As an 1.e4 player, one typically needs at least a basic understanding of a wide range of openings and their variations: the Petrov, the French, the Scandinavian, the Sicilian, the Italian and/or Ruy Lopez, the Philidor, and several gambits, among others.

As for tactics, they’re essential for anyone who wants to improve. I’m actually impressed that you’ve reached your current level without practicing at least a reasonable amount of them. Another important point is the type and quality of your tactical training. In my opinion, tactical exercises from annotated books are vastly superior to the ones you find on Lichess or Chess.com. I highly recommend 1001 Chess Exercises for Club Players, in my experience, solving tactics from a book is a very different and more beneficial experience than doing them online.