Thanks for the advices, yesterday I started a game on Emperor with Hiawatha on huge, fractal map, 19 civs, 28 city-states, quick speed. Yes, I know that it's much easier to play on smaller maps, and on marathon speed, however I can't stand it, it's too slow for me. I know that Hiawatha is not the best choice, however on King level, there were three civs, what were always strong and dangerous for me: The Iroquois, Siam and Russia. I already tried the two others, so I thought it's time for the third.
So, I was very lucky on the map, I started on the southeastest part of the map on the tundra. Maybe it's not the best for economy, however it's better, because of defence. However my neighbours are not the best, I border Alexander and Augustus on the west, and Napoleon on the north. Alexander and Augustus have already attacked me, but I managed to beat them, I even managed to pillage and raze Knossos at the end, and I puppeted their ally Florence. Now I'm in war with Napoleon, with the alliance on China. I'm second in literacy, science victory is my goal. Now I'm around 130 turns. What do you suggest?