Depending on the ship, it's not just a choice of inside vs balcony. There could be the choice of "outside view" or whatever the cruise line calls it, where you'll have a window looking outside. Pre-pandemic, DW and I were annual cruisers for 25 years.
For a first cruise, I strongly suggest not booking an inside cabin. Enjoy the view, the ambient daylight, and the overall cruise experience with an outside view or balcony cabin. You can easily save some money by avoiding the overpriced and, frankly, unnecessary extras: drinks (or, more than one per day), photos, ship gift shop knick knacks, etc. Thoroughly read between the lines of shore excursion descriptions - some are worth the money, others are just rip-offs like "day at the beach," which often is nothing more than a bus ride to the beach.
If you enjoy your cruise, you can then decide if inside cabin is right for you on a future cruise. DW and I went full circle; first 1 or 2 cruises were outside cabins, then we went to inside, but over the last 10 years of cruising we did balconies only.