stuck on marketing my business

Ask your last few customers how they found you. Whatever comes up most, put more into that before trying anything new.

What kind of business, and local or online? The answer changes a lot. General starting point though: get your Google Business Profile fully filled in if you serve a local area, ask your last ten happy customers for a review, and pick ONE channel you can keep up every week instead of trying five at once. Most people stall because they spread thin and nothing gets enough time to work.