It is really a good decision that you are going to buy a coin for long term
Please don't make decesions in hurry for investing into any crypto project, there are so many scam projects coming day by day which creates a bad economy here
Give your time and do some good research , check everything or if you find anything wrong then leave it, remember your one wrong decesion can results into a big loss so be careful and don't invest much into one
Diversify your investment as much as possible because it is very hard to predict which one will gives good results and which won't
I hope for your success in crypto
Good luck