You see the problem is I don't believe you'll be satisfied with this new signature you're hoping to receive, even if it does just say SN1P3R. You'll join another clan and want the clans motto or tag in there. You're constantly dissatisfied with what you already have. So learning to make your own is the obvious thing to do. That way you only waste your own time by being bored of what you already have, and you don't sit there expecting people to do something for you every time you leave and join a clan.
Furthermore; the more you know the more you can do with yourself. So taking the time to download the programs and copy tutorials will open new doors for you.