The game is fairly straightforward to play. A lot of the mechanics are similar to a lot of miniature games.
There are not really stats for units though.
Infantry is categorized into Inexperienced, Regular and Veteran. This effects what it takes to wound them, as well as modifiers for hitting. Inexperienced is always wounded on 3+, regular 4+, and vets 5+. This also effects their leadership as well.
Hitting is all about modifiers. Long range, short range, point blank, cover, moving etc.
Vehicles are categorized under what it takes to wound them. anywhere from 6+ - 10+. Some weapons clearly give modifiers to wounding so you can damage tougher units.
For example, my Quick fire 6 pounder anti-tank gun, has a +5 modifier for damaging, so when rolling to wound, I add 5 to whatever I roll on a D6.
When making a list, you get one order dice for each unit you have. Both players should have the same type of dice, but a different colour for each player and are all put into a bag. Each turn a random dice is taken from a bag, and the player the dice belongs to can choose a unit to take an action. Dice are kept drawn randomly until all units have activated. When a unit dies, the player removes an order dice.
Actions are things like rally, run, advance (move and shoot), shoot, assault, amongst some other things.
Besides that, the next big mechanic is pin markers. Every time a unit gets at least one successful hit on an enemy unit, the targeted unit gains a pin marker. Pins can be accumulated, and some weapons (like barrage), can do multiple pins.
A unit gets a -1 to hit penalty for each pin marker it has, and if a unit has any pin markers, then have to take a leadership test to do any action (at -1 per pin), or they are pinned for the turn.
There are ways to remove, or mitigate pins.
Typical games are around 1000pts, and you don't really need a whole lot of stuff.
Tanks are really expensive (around 250pts give or take 100pts), infantry squads range between 100-200pts, and most weapon teams are between 40-70pts.
The game scale is 28mm, so the same as 40k. But, not heroic scale. So, a Soldier in Bolt Action is the right size to a space marine as a human should be, and are all on 25mm bases.
Feel free to ask any other questions!