Lora, auto or revolver ?? Which do YOU feel most comfortable with ? Over the years I have carried both extensively and each has their own merits. But it is truly a very personal thing. If you are comfortable with a revolver there are some fine choices out there, my first pick would be a K Frame S&W, one of the two or three inch versions (less common than the 4 inch) Model 10s with a round butt makes a fine piece. Many leap toward the J Frames and they are certainly concealable but you pay a price in “shootability”. I have a fond place there somewhere for the Model 36 but I also know it’s limitations (carried lots shot little). The Ruger SP101 is kind of between the 10 and 36 in size but I have no great experience with them, others here will.
If you are an auto kind of girl then there is the Glock family of course… that said the 26/27 can be pigs of things. I know several women who have no issue with a full sized Model 17 or 22 but the compacts just don’t work for them, literally. The G19/23 size is well and truly my favourite size in their family, there are also the Kahr and Ruger offerings in the smaller size, in the subcompact autos even 9mm will be a bit of a pig to shoot so you are back to battling concealment vs shootability. I like a balance between both. If, with no other knowledge, I had to make a single recommendation for “anyone” it would be from my first choices, S&W Model 10 or 13 (.38Spec vs .357) in three inch with a round butt (square is OK as well) plus an initial purchase of around 500round of mild .38 (not target but not plus P) to get the feel of it.