The restriction on upvoting is necessary to have any chance of handling vote fraud like users upvoting themselves with socks. If any new account could vote it would be far easier to cheat the system.
15 rep is also a very small barrier. Asking good questions or editing are probably the best ways to start. Editing is certainly something a new user can do, simply fixing the formatting, grammar and typos in new questions will give you 15 rep in no time.
15 rep is also a very small barrier. Asking good questions or editing are probably the best ways to start. Editing is certainly something a new user can do, simply fixing the formatting, grammar and typos in new questions will give you 15 rep in no time.