When you really think about it most of the jobs people end up doing and honestly most things people do in general aren't really 'meaningful'. It's up to you to figure out a meaning to the things you do.
It doesn't need to be grandiose. I like the fact that I get to make things at work. The things I make take skill and craft to make and not everybody can do it. In my free time I enjoy making other things. They're all kind of frivolous but in the end anything other than the things necessary to exist could be considered frivolous.
In the end I found it was better to try and find a bit of meaning in otherwise meaningless things and appreciate that than search for some overarching grand meaningful thing to do.
I tried that....in the end it didn't end up mattering, my own wellbeing in life ended up suffering and I didn't really feel that fulfilled doing things that 'made a difference'. In the end everything comes down to perspective and not everybody needs to do something grand and amazing.
As long as you're doing your best to better yourself at various things in life. Whether it be skills or life in general I figure you're probably doing alright. Anyone can only really do the best they can at things. This may ending up being great and beneficial for lots of people or maybe only a few. But everything kind of makes a difference. Even little things.
Sorry this may have came off kind of discoherent and rambly but these are kind of my own thoughts i've had about such things over the years.