M18 9mm for conceal carry?

I’m looking to get my conceal carry. I’m very new to shooting and only shot a few handguns. I went shooting today with the Glock 43X, sig p365, sig229 legion, and M18. I was the best shot with the M18 which is military grade I think, and it feels easy to shoot. The sigp365 my aim was all over the place and not consistent (but it did also have a laser optic so that might’ve thrown me off) I plan to shoot more with the 229 and M18 more to get better with my aim and comfortable with both, but I didn’t know how good M18 would be for a conceal carry. I’m also 5’5” and around 117lb so I’m smaller and don’t know how easy it would be to conceal