How do I not be a socially awkward fucking prick?

I've almost been in school for 2 months with still no friends and it's starting to get to me. Sitting alone at lunch and my little sister being the only person I communicate with is starting to make me feel pathetic. Everyday at lunch I sit alone and I'll have my head in my phone pretending to be occupied to appear as a person minding their own business, or at a table thats somewhat full to blend in and some days I go as far away from the main areas people usually eat at so no one sees me when in reality I want to reach out and make friends instead of being such a socially awkward fucking idiot. Being the new kid at school is honestly so hard for me, and I've been told that friends will eventually come but I'm currently convinced I'm the whole problem. Idk what to do at this point I need help.