Guys i Have a question

You don't do singles in the guaranteed gacha. You chose the class you want, and do a 10 roll, the poll of servants will be all the non limited gold servants of that class. At least one of them will be a ssr.
you can roll in this gacha only once, after you roll once the banner disappears so think carefully what ssr you need the most. If you don't have waver/tamamo caster is the best deal.