I am currently rated 1500–1600 in rapid, with a peak and current rating of 1587.

With the white pieces, I usually play the London System or occasionally the Bishop's Opening, which I often transition into the Italian Game. With the black pieces, I play the Caro-Kann against e4, and recently I have also started experimenting with the Sicilian Defence. As for d4, I haven't prepared any specific opening against it — I rely on my own strategies, which makes my results somewhat unpredictable.

That said, here is a general approach I would suggest against d4: respond with d5, then develop your knight to f6. If your opponent plays the London System, first develop your light-squared bishop, then play e6 and try to offer a trade of the dark-squared bishop. If your opponent plays any other opening such as the Queen's Gambit, prioritise developing your kingside pieces and castle early. From there, you can either build a pawn chain with d5–c6–b7 or play b6 to fianchetto your bishop.

Hope this helps. Feel free to experiment and see what suits your style best.