How to deal with my son going through puberty as a single mother?

This is an area you have to be careful in. Testosterone is flooding his body and he can anger easily. You will notice huge mood swings depending on when his last wank was (sorry for the crude language). He will be happy one day, and angry the next.

You need to feel him out to see if he is into girls or guys. The world is a difference place these days from what I used to see as a kid, but whichever way he goes, it should be OK for you too. How many depressed/suicidal kids are out there thinking their parents hate them because they like same gender.. this is huge. Love him regardless.

Keep him away from bad influences, bad people, drugs, theft, running around at night. This can be a relationship breaker, or even kill him if it goes wrong. It won't be easy, but you have to try your best.

Teach him how to dress, how to cut his hair, shave, get him into a hygiene routine so he is always clean, wears clean clothes, brushes his teeth, puts on deodorant, shaves. The basic stuff. If he likes a pretty girl at school, he is going to need to look his best.

Keep an open mind, every kid is different, and will struggle with certain things. Just always be there for him without smothering him. Let him grow into it.