Seriously! A Noob's noob in need of guidance & charity.

I am new to anything gaming. How new? My last videogame console was an Atari 2600 (I still have it somewhere). My family acquired a PS4 over the holidays (Xmas noob) and I am now addicted to Destiny (considering my last video obsession was missile command you can tell I have a long way to go). I am not even sure I am posting to the correct place. So far,... I have a 26 Hunter, 24 Titan, and just started a Warlock lvl 5. I am pretty good at PvE but horrid at PvP. I am now trying to learn the whole social fireteam, strike (VOG), stuff.... etc. Trying to clan/team up with DadsOfDestiny folks to help me when I eventually try VOG, ... I've done plenty of Vanguard runs. Things I need some helpful guidance with: My titan seems stuck at lvl 24. I do dailies, bounties, vanguards, and some PvP. Do I just keep grinding? Or do I buy from Xur? What is a good level to attempt VOG? And, how the heck do you coordinate a strike team? (be kind... I am nooby noob). FYI,... I am a 47 yr old father of 8 year old twins (boy/girl) and teach in a university physics department. Thus, I learn quick, but am sleep deprived (who isn't). Dr. Joe