I find joy in sketching for myself with no intention of "showing" my work. A few years ago I saw a group of artists in my town, struck up a conversation and next thing I knew I joined them. I made new friends and sketched at least one time each week with them. As it turned out every member is an accomplished artist and they have been meeting weekly for over 30 years! I call myself an "honorary member" and they were happy to have me join them. BTW they invited me (insisted, really) to submit a sketch to their first, ever, group showing at a local university. They have all "shown" individually through the years. I was more than pleased to comply and we had a great experience seeing one anothers work at the opening reception.
I keep a sketchbook in my daypack and sketch whether I'm on the trail (I take daily hikes near my home) or by the trailer. I find I really "see" my subject in a way that taking photographs never did for me.
I say, stop apologizing and keep up the good work.
The Gleeful Glamper
"Here we go again on another amazing adventure"