Tips for beginners trying to improve their game in War Thunder?

the best country's begginers can try are Soviets and Germans. Germans are Advanced in 1st rank since they were overwelming since 1939, but weak in armor. also very strong guns. in aviation also. fighters are best to start with if you are aviation. (planes) Soviets are also good, though they seem to be a tough nut to crack, they pack quite a punch. aviation also. the yak 9 is already a seemingly 2nd rank plane. i hope this helps!

Get the Panzer pack, or get a weird tank that is uncommon, such as the Panzer II Ausf H. Only some people buy tank packs and because of this tank's lower armor, people don't usually use it. You can pretend to be an enemy because of its odd shape and colour that is not seen on most of the other tanks.

It is true for some other tanks (you have to use simulator battles for this to work) if you lob shells towards you own base (and artillery near yourself to make it look like you’re retreating just for safe measure) you will seem like a friendly tank to the enemy. Doing this, you can easy infiltrate the enemy capture zone and they will be confused as to where you are - you can take them out easily as they will turn their weak armor your direction.

For the best results, get a ally/friend to stay about 1 square away from you and feed you info on the enemy tank's movements.

The russian line in general is a good place to start. The planes are good and the tanks are fenominal if used right, just make sure you know how to angle your armor. The only bad thing about the russian tank tree is the guns are pretty lacking for the first few ranks, (1-3).