Welcome to the hobby, and congratulations on coming into what appears to be a good, solid tabletop machine. Even if "off brand," such are nice because you can just enjoy playing them--in short, having fun.
I wanted to add just a few words. First, it looks to me as if the reproducer (that is, the round "sound box" that holds the needle and has the vibrating diaphragm) may be secured with a set screw that would let it rotate 90 degrees, so the clear diaphragm is facing forward instead of sideways. Is that right? If so, the machine can play regular "lateral cut" and also "vertical cut" records. (Not wishing to toot my own horn, but I've written an article about the difference, available here:
https://www.tnt-audio.com/vintage/mono-a-mono_e.html)
Second, you may encounter United label records, which have a large spindle hole like (but, I think, a bit smaller than) that of a 45 RPM disk. These were the product of an earlier United company, a purveyor of what are sometimes known as "scheme" machines. It built none itself but rather obtained them from what today we would call an "original equipment manufacturer" or "OEM," probably Columbia, which made something of a specialty of supplying such things to other companies. Often they were assembled from parts the mfr. had on hand for discontinued models. These United (or whoever) would give away or sell at a very low price. Each machine was fitted with an oversized spindle, meaning it could play only records supplied by the seller (here, United), because other makers' records' spindle holes were too small and wouldn't fit. The records, too, would ordinarily be back catalogue numbers sourced from one of the major companies, again usually Columbia. Occasionally you'll come across a major label record with the spindle hole crudely broken out to a bigger size; I'm sure these were once owned by "scheme machine" owners who were trying to get more recorded variety! Other makers that followed the same "give 'em the razor, sell 'em the blades" approach included Standard (ca. ½" hole) and Aretino (2? 3? inch hole; in all events, huge, surrounded by a band of paper maybe ½" wide). Busy Bee took a somewhat different approach; instead of an oversized spindle, it put a stud farther out on the platter that engaged a socket on the underside of the (single-sided) record; again, other brands wouldn't fit the platter because that bump would keep them from seating on it.
Third and finally, in case nobody's told you yet, when playing standard 78s, at least, be sure to change your steel needle with every play. You can find lots of info about that elsewhere on the forum.
So, again, congrats on your new acquisition and welcome to the fun!