How to fix skinny-fat body without losing too much weight? (ectoladuk)

I am 33, a non trainer and weigh about 14 stone at 6 ft tall. The mad thing is i still look slim to many as I am naturally very skinny, in my early 20's I was only 8 stone and 6ft tall, insecure about this and too insecure to go to gym I kept eating and e..