It sounds like you have some questions that could better be answered if you did a little reading first. Check out the Fiverr Academy so you don’t have to post everything here and wait. In the meantime, though, I can help a little with these questions.
1.) You should make separate gigs for separate skills unless they are so similar they would make good “Extras” for a gig to be sold at a higher price.
2.) Make a gig once, not every day. It stays up until either you pause it, delete it, or unless Fiverr removes it because it breaks a rule or doesn’t fit their focus.
3.) At first you will get some visibility because your new gigs will appear in the “New” section of Fiverr. Some buyers will visit that area in hopes of finding some cheap work or a new diamond in the rough. Just be careful and read that Fiverr Academy too because you don’t want a buyer to take advantage of you. While you are still new, start looking at Buyer Requests right away. You can bid on things that buyers want which will help you get your first reviews (stars.) If you don’t know about Buyer Requests, you will learn about it by reading the help articles and by poking around in your seller options.