Your smartphone can produce better results then you would expect. Try using the lightroom app, a lot of phones these days are able to shoot in RAW format using that app. Also you get manual controls with that app so you can keep your ISO low and control exposure speed and even shoot long exposures if you put the phone on a tripod or something else to stabilize it. A modern smart phone doesn't really hold you back, the other half of the equation is post processing and the trick to that is to shoot in RAW instead of JPG. Watch youtube videos about how to do proper post processing. The ligthroom phone app is everything you need. The camera in my DJI Mavic Air 2 that I used to take the photo included in this post is very far from a professional camera and is actually a lot more like what you would have on your phone. It's not a large sensor, doesn't have the ability to swap lenses or anything like that. I would argue that a lot of flagship phones these days have better cameras then my drone does. It really is not the camera that makes a photo look "professional". I have never owned a professional camera in my life, im not a professional photographer, but people assume my work is professional all the time. A lot of my feedback is people floored by the results I get with cheap/old camera gear that is far from professional. The biggest difference maker is light, how the scene is lit will make a bigger difference to your result then anything else. 2nd biggest difference is shooting in RAW format (never shoot JPG) and then using proper post processing. If you master those two things the camera your using will be almost irrelevant.