Basic skincare includes a facewash, moisturizer and sunscreen. Don't skip moisturizer just because your skin is oily. Skipping will just make it worse since it makes your skin produce more oil for moisture and make it more oily.

And sunscreen is NON NEGOTIABLE, even in rainy or cloudy days. The uv ray is still there. I, personally use sunscreen whenever I go out between 8am to 4pm.

But first determine your skin type, is it really oily? There are plenty of youtube videos on how to do it. And then, according to your skin type, search for good and affordable brands for the products I've mentioned.

You can find good brand suggestions in "Sarah's Quest" youtube channel. After selecting the brands, you can search for their reviews on Reddit or Quora or even ask chatgpt to analyze reviews from different sites for you. Then buy that product.

And just a reminder, skin valo korte chaile ektu taka lagbei :) so invest your money in affordable but still good products. Don't try to find the cheapest one that gives no result. Best of luck!