the first question is "how familiar are you with this market?" based on your comment specially the point #5 and the fact that you say you want to buy and hold a  bunch of coins, i assume you have no idea how this market works.

so my suggestion is that you should first hang around in the market for a couple of months. and most important of all you should try to see the history of different  coins. check their charts in the long run like for a couple of years and see how they have been changing.
try to figure out why each coin rises and falls (aka pumps and dumps) and try to take advantage of that if you want profit.