Foreign country and volunteering sounds great to me, but that's possibly because *I* am interested in those things. I've spent time abroad and I have to say you get a lot out of it and meet really cool, interesting people (moreso than I ever met in my home town). I didn't learn to like myself but I did learn certain important things and it's set me on a road of discovery, I guess.
My advice is work on your confidence, and THEN go and have a life experience. The other way round doesn't work that ideally.

Or alternatively yes, get a job you would enjoy. Accounting is not for you, that's obvious from your post. If your main priority in life is 'earn as much as possible' then it might be a good option for you, but again I didn't get that sense from your post.

What are you interested in? What appeals to you most right now? If you could do any of the ideas in your head, which would it be? I think ultimately life is there to be enjoyed, and your choices should reflect that wherever and whenever possible.