For a 10 year old, I'd actually commend you for acknowledging your actions as being wrong, so despite the situation you're going through, look at that as a blessing.
Now that you acknowledge these acts as being wrong, take the next steps in avoiding them. If you are surrounded by friends who engage in these things and talk about them, try to separate yourself from that type of environment. Unfortunately, so many of the youth are exposed to things they shouldn't be exposed to. This is nothing new, but it has become more prevalent in today's time thanks to technology. This could cause you to be addicted and will only compound the issue (going from one thing to another). Think "gateway drug".
Depending on your relationship with your mom, I'd also avoid lying about praying. I'm not saying to disclose your sins to her, but maybe you can explain to her that you're going through some things that have affected your faith. Not everyone has this kind of relationship with their parents, so only you would know what's best in that regards. Continue spending more time on religious sites. Ask questions, post updates, basically anything to help you along the way.