you should really go to 420 for threads like this but I'll help you out.
My first time smoking was a ton of fun even though like others have said before me, you usually only get a buzz your first time. we smoked out of an apple and I don't remember coughing much at all, but it really depends for everyone. watch out for the smell and always blow the smoke up towards the sky so it doesn't get on anyone's clothes. get a little crew together and just chill out in someone's house while nobody is home and play some tunes, make some grilled cheese and just have fun. your first few times getting high will be your best so enjoy them! I would say you picked the right time of year to start because I started around this time of year as well and it will make this summer one of the best in your life. Instead of buying a metal pipe just get a lighter and mooch off of your friends for the first few times. I made a bubbler out of a baby bottle pop and a trumpet mouthpiece that worked really well for a while (pm me for more info) until I bought a glass piece that I still use today. You won't really need to buy your own weed for a while and you probably won't need a grinder at all unless you rolling j's. It sounds like your going to be smart about this but just remember not to get carried away and make stupid choices. I've made my fair share of stupid decisions involving weed but I've still managed to not get caught. Good luck and enjoy yourself man! pm me for questions and shit.