You're going to want the big winches by the cockpit
, for headsail trimming. Although as to exactly where, that depends upon the cockpit's layout, & your preferences.
Likely the smaller ones are for hoisting the sails
That said, your wisest move would be to hire a rigger for an hour or three. To go over these questions, & the many, many more you'll come up with. Plus, you can have him inspect your gear
at the same time. And make recommendations, etc.
And, more than likely, there are some boat
savvy folk nearby, who'll be happy to assist you.