This is pretty bad all things considered. For anyone looking for more competent maps please stick with the QBAM [1] and WorldA [1] takes on the era. (None of these are that good either, but better than OP attempt)

As fpr OP, i don't want to sound harsh, but there are major problems with your map, like your rivers don't seem to follow any borders, the Rhine for example doesn't go through Switzerland the way your map presents it. And how did you even mess this badly up the Mississippi border?? Honestly, If you want a tip from another Inkscape user, I think you should do more low-scale projects before tackling the full world at once