Where shoud I go?

Hi, folks! I'm Robson and I'm here trying to get some advise that could help me to choose the best option for me. I'm aware that that is a tricky question and I'm supposed to be the person who come up with the answer. But the fact is I'm really not sure where I shoud go. Acutally I have three options. USA, South Africa  and Finland.

I believe United States to be the first option  on  english learner's mind, along with England, specially because its culture is widespread around the world and its cool english style. Definitely, it would be my first option if it wasn't by the fact that I've already attempted to visit it, but I had my visa denied by the US embassy. It was a really frustating and upset experience particularly by the reason given to me. They told me I didn't have tight bond enough to my country which assure I would come back from the trip. Well, I'm marriage, public officer, I have my own house and all of this wasn't "tight bond enough" to them. I applied for B1 visa, by the way. So, I think If I wanna go to the USA I would have to apply an english exchange course, which would cost me a lot more money. And I'm not sure wether I'm in mood for it, inspite of providing me some benefits.

South Africa's just come out to me as an option,recently. There's a lot of volunteering programs that can possibly make the trip gets cheaper. Besides that, by being a volunteering program, I would meet people from different parts of the world. However,  I actually know pretty much nothing about their culture,custums.

Some of you  might be wondering: why is Finland in his list? It isn't even an english speaking country. The reason I put Finland in this list is a bit different than the two above. I have a friend who lives there for a very long time. Last year, she and her husband, who is finnish, came to Brazil in order to make their wedding here too. And I promise it to them that next year, 2018, I and my wife would visiting them. But, it happened that we, my wife and I, couldn't match our vacation. So, If I go there I'll have to do it alone and for some reason it sounds a little bit embarassing to me. Related to english practising, I know that more than the half population in Finland speak english. But I can't imagine myself going there without knowing at least the basic expressions in finnish language, lol!

And that's why I'm messed up on where I should go. thank you in advance for helping!

If anybody could analize my english through this text  providing me suggestions on how I can improve it or even if I made a mistake and did not realize it, feel comfortable to do so.