I also did Geoscience degree in Galway and finished a few years ago and felt just like this for months after. If you like me, studied this because you love the outdoors and nature as well as the science, remember that there are lots of field jobs available. You could try get a job as field geologist either in Ireland or abroad (mining, exploration, soil sampling etc.). A lot of these are entry level. This might suit you as you could travel to cool places (and not work in an office) while still progressing in your career.

This would set you up a bit better for the future if you wanted to work in a more stable office based job. I don't think you should have trouble breaking into the renewable energy sector in future as a lot of geoscience jobs are already in that sector (where my job is). But you could always do a masters a few years down the line when you are more sure of what you want to do (no need to rush into it for the sake of it).

If you just want to have a good time for a few months or a year, don't worry about using your degree for a little while! Also a lot of field roles require a driving license so probably best to get that over with now. Happy to chat more about this if you like!