How Big should i be betting preflop. I usually bet 3 BB for the first few rounds of blinds then i go increasingly smaller when the antes going up. Then I will just be doing a min raise because the antes are big enough?

In freeroll Cardschat PS actually you wil bet all in... its the only possible play actually

Yes the general rule of tournaments is what you have described.
When we are deep stacked we can open raise something like 2.5x-3x(I go 2.5x in real money MTTs and 3x in freerolls) , with 35bb+ something like 2.2x and below 30bbs just 2x it's ok.

The rule of thumb I believe is 2-3x BB. I see most probably around 2.2-2.5x. This assumes you are first to enter the pot. If others have entered before you (limped) add another BB per limper.

in my opinion always increase two or three times !! and analyze the hand and opponents well!

For me 2.2bb is the usual.

I don't think the open raise size is super important if there is a strategy behind it and you are consistent; a nightmare for you would be to vary you bet size based on your holdings strength. It won't take a rocket scientist to realize that you always bet smaller for value and big on bluffs or some other obvious patterns.

- 3x open raise is usually seen as the standard.
- 2.5x has become more popular among strong players in deep stack poker lately. Daniel Negreanu's "small ball" approach notoriously utilizes 2.5x. However, lower open raises will almost always bring more callers. So 2.5x players (versus 3x) should be more confident in their post glop play; the complicated post flop many beginners make mistakes at.
- Related, many beginners will open larger. Something like 5x consistently to reduce multiway pots played. Here they are "charging" good players from going after them; the bigger open raise also polarizes the ranges so hand reading is easier.
- Another idea I've heard is to open raise your default amount, but then increase it against specific players in the big blind if you really don't want to go heads up against them (like a pro or maybe a reg you have no history with).
- Finally, there is the 3x + 1 bb (or some amount) per limper.

I think all of these can work for your skill level/ play-style as long as it fits your game.

Once again I have to say it depends on the table. usually I go 3x maybe a little larger in the early rounds. But if I have a calling station at the table and I can basically get away with a larger open while keeping him in and isolating it to a heads up situation I will adjust my opens as needed. Also true if I have a tight table and I can steal the blinds with a little larger open.

With full stacks, the raise size is 3BB, and as the blinds increase, we reduce the raise size to 2BB. So I agree completely with your sizing.