Do you play with one tank per match or a full line-up? There’s no specific way to easily research one specific tech tree or another. Every tech tree research fall under how you perform and if you’re able to afford Premium account time or Premium vehicles.
- Focus on one Tech tree at the start. Grind it up, when you have it you will get resarch bonus for all other trees.
- If you know how to aim use Realistic battles instead of arcade → more RP
I would go with france. From Rank 3 good tanks which sometimes forgive some rookie mistakes.