If you don't need/want it yourself, and no one's paying you to do it, yes, you'll lose interest. I don't have your problem; I reach for code as a solution pretty quickly. Probably key is I'm not trying to "finish" personal projects or make a product, just doing as much as I need at the time.
Since you know web development, maybe install TamperMonkey and start "fixing" or improving websites you use regularly. You can often make a significant difference to your experience with a few lines of code written in a few minutes (changing/adding CSS rules, making links visible instead of hidden in dropdown menus, reordering/recolouring things, presenting information in a more sensible way, adding shortcut keys, converting static tables to DataTables, etc.). Over time some of my user scripts have grown to many hundreds of lines, and even been adapted to be essential components of workflows of me and my colleagues. They make my job/life easier dozens of times a day.
(Most of these are for internal websites or idiosyncratic to my needs, so there's no point in sharing them.)
Since you know web development, maybe install TamperMonkey and start "fixing" or improving websites you use regularly. You can often make a significant difference to your experience with a few lines of code written in a few minutes (changing/adding CSS rules, making links visible instead of hidden in dropdown menus, reordering/recolouring things, presenting information in a more sensible way, adding shortcut keys, converting static tables to DataTables, etc.). Over time some of my user scripts have grown to many hundreds of lines, and even been adapted to be essential components of workflows of me and my colleagues. They make my job/life easier dozens of times a day.
(Most of these are for internal websites or idiosyncratic to my needs, so there's no point in sharing them.)