Yeh I guess I mean again I'm not entirely 100% sure I am correct but in day to day life I would say "I'm planning to visit Russia [one day]" and then "I'm going to Russia [in a few weeks]"... this is why when I came across the word собираюсь I was really confused as some sentences on this program I use would say "I plan to swim" which yes does work. I guess it's not that it doesnt make sense it's just one of those things that would maybe sound odd in normal speech. I would say I'm going to swim if it was going to happen soon like... i'm a theme park "hey guys I'm going to go swim in the swimming pool". but if it was an event, such as my birthday and I was telling my friends what we were going to do that day I may say, "I am planning that we all go swimming".

Hope this slightly helps.