if you are in the save point you cannot build a house there. if that is not the problem close the app (or force close it) and start it up again. if that does not work contact the developers.
you shoudl be able to do it yourself.
best it to find a place to gather moss and get some
make sure all your stats are 0 so you can fight longer
get your best weapons and keep trying aslong as the battle won't kill you keep trying ie if your win percent is 20% stats will say thats 1 in 5 will win so hopefully after 6 tries you will win.
if you are going to die, Escape or (force close the game and reopen) then rest/heal and try again.
if you are online ask for help or a boost and also do the bits above. The boost will increse your chance of winning but it may take up to 3 goes depending on the boost.
if you are getting to much damange get better armour and/or better car with more protection.
if you want better chance to win get better weapons. Self-Made_Rocket_Launcher is the best weapon you can make.
What your are asking for is essentally a walk through. this game is open ended and you could have lots of fun without doing any quests.however the quests lead you the next quests all the way. the only one that does not fit this is the moving city quest. This quests you need to find him and none of the other quests send you to that city.
my suggestion is
follow the quests, when you have a few quests open do the one that is closest. the only exception is Returbution you wil get near to moscow do that quest then comeback to seraching the truth.
the rest will work it self out.
as for Bandits check the wiki for each Bandit camp or just avoid them if you can.
next tip is save Sulfuric acid/soap/honey as you will need trade that for Diesal for the moving city quest you will need about 9KK (million) of it to move the nulear parts. but that info is in the wiki already.
For you first point you can already change weapons before you attack so you pick a weapon you have on you.
just press the wepon you are attacking with to change it. it cycles in a loop
The map is marked as deleted. not sure why?
there are many more locations than shown.
I cannot take credit for the graphic someone posted that.
but I can for the google doc
I have added a trading page and a link to a google doc that shows the traiding route and trades nothing new just nicer and has weight info