Ranpuraa is Lampent's Japanese name, so that's an awesome username to pick! <3; I love that Pokemon - it's one of the best ghost types ever. Welcome to PC! Your English is good and you're right that you'll be able to practice by being here, so no worries.
Oh, it's awesome that you're French! We don't have very many people from France here. One of these days you should totally show me around, hehe. But anyway all jokes aside, it's also cool that you collect shinies as that's become a hobby of mine as well, especially since the Masuda Method is always out there to try and makes it so much easier. The fifth gen is one of the best gens, too - do you have B/W2? The Shiny Charm was one of the coolest things they ever introduced and I'm honestly so anxious to fill the Pokedex so I can get my own. *~*
Buut it seems you'll fit in perfectly here. You love Pokemon, have some awesome interests outside the franchise, and are a nice person who likes great Pokemon. Of course you'll fit in fine! PC has an amazingly active
Shiny Hunters Club that you should definitely join as well. It's been open since 2004 and shows no signs of slowing down yet. :D We had a ghost club open before, too, but I don't see it open right now so it might have been closed. You can always make your own in that case!
Enjoy your stay on this wonderful forum and make sure not to disappear on us, yes? Have fun!