plenty of weight gain formulas out there mate
best off joining the gym and having a word with one of the guys there about what you want to acheive and how you want to do it then they can advise you personally on what you will need and how to use it
its not all that hard, its more what foods rather than how its prepared, i personally have sarnies all the time during the day with chicken and tuna etc and then a decent meal at night, breakfast is an important one, porridge is my fave atm.
best advice i can give is stick to it. enough ppl who give up in february lol. january is unbearbale in my gym, think ill start training at 6 when it opens