There are many guides and guided tours.
There is a forum search feature and you can search for Pompeii tour guide and find both companies and individuals. You can also search on Trip Advisor for Pompeii Activities or Pompeii Tour Guides or Guided Tours and find more.
Some are group tours, some are small group and some are individual. Your choice and your budget. Prices vary widely.
We used Gaetano Manfredi in 2025. We found him to be worth the price … pretty expensive, so he may be beyond your budget; we just had a “half day” or 2-1/2hour tour with him. But my goodness, how he brought Pompeii to life. And amazingly, other guides had their groups step aside while Gaetano led us past them to whatever corner of a room or whatever fresco that he wanted to show us closely. It was remarkable how the other guides and groups melted away in his presence.
BTW, he got the tix for us, so we stepped off the train and walked toward the gate. We found each other immediately because we had exchanged pictures via What’s App, so no wasted time.
If you search the forum and the net, you will find others. Askos, Mondo Tour Guides and Pina Esposito are names that come up. I don’t know any of them, but this should give you some leads.
I am very glad that we went to the National Archaeology Museum (MANN) in Naples the day before our tour to get acquainted with Pompeii, many artifacts, tile work and sculpture. Unfortunately, it sounds like you may not have the time to do that.