Help needed - guitar damage advice

Hello, I have been playing guitar casually for about 15 but never had any official lessons. I have a history in music (piano, violin, uke) so I picked it up naturally. I've had pointers and tips along the way but definitely mostly picked up guitar to express myself and to accompany my singing. I don't play shows, mostly just in my living room and occasionally for a small group of friends and neighbours. I've had both acoustic and electric over the years but again, no real lessons or advice about guitar maintenance.

Here's the problem: this is my acoustic guitar, Yamaha, only cost a couple hundred bucks, I know it's not the best but it does the trick. This is the 2nd guitar that this has happened to and I want to know if there is something I'm doing wrong and how to prevent it from getting worse or happening to future guitars.

I assume it's something with the humidity or the tightness of the strings. Seems like my body is cracked right where it connects to the neck. Also the action is very high. Any advice??? The more detail the better!!!

Hello, I have been playing guitar casually for about 15 but never had any official lessons. I have a history in music (piano, violin, uke) so I picked it up naturally. I've had pointers and tips along the way but definitely mostly picked up guitar to express myself and to accompany my singing. I don't play shows, mostly just in my living room and occasionally for a small group of friends and neighbours. I've had both acoustic and electric over the years but again, no real lessons or advice about guitar maintenance.

Here's the problem: this is my acoustic guitar, Yamaha, only cost a couple hundred bucks, I know it's not the best but it does the trick. This is the 2nd guitar that this has happened to and I want to know if there is something I'm doing wrong and how to prevent it from getting worse or happening to future guitars.

I assume it's something with the humidity or the tightness of the strings. Seems like my body is cracked right where it connects to the neck. Also the action is very high. Any advice??? The more detail the better!!!