I believe in Allah, but how do I feel Allah SWT’s presence around me? How can I feel that Allah SWT is watching me, so I don’t sin? What I mean is that I feel disconnected from Allah SWT. How do I make my connection with Allah SWT stronger?

How do you believe in Allah, but not believe he all-seeing, all-knowing?
You need to pray on time and supplication is essential. Especially morning prayer, you need to supplicate then.
Read دعاء العهد to reestablish a connection with the connection to Allah.