If you want to play online I'd suggest you first play through the campaigns. You should play them anyways since the single player is actually pretty good. Once you get a good idea of which units complement which units and what units counter which units you can move on to learning builds and such for multiplayer.
If you do want some tips for beating the AI in tvt though here are some:
-Send out an scv early on to run around your enemies base to see if he's teching or pumping marines and defend appropriately.
-An early 2 factory build with vultures can help you get map control. Vulture speed and mines make them great for harassing and containing. Mines at your enemy nat will prevent him from expanding and killing enemy scv's will give you an econ edge.
-Expand when you have map control. SC is about as much about micro as it is about macro.
-Dropping tanks on the cliff above his main can net a gg if he has inadequate defenses.
Overall as a terran player you need to get down the backbone of a terran army, either marines&medic or mech. M&M is a bit more difficult to control than mech which is just a-move so it might be easier trying mech first. Practice slow pushing into your enemies base with tanks and vultures. A lifted engineering bay or barracks is useful for getting vision for your sieged tanks. If the opponent has a significant air force add goliaths to the mix or build turrets all around your tanks. Eventually you will want a few sci vessels for EMP against toss or irradiate against zerg, and d-matrix is always useful for units being focused. Leap frog the tanks in the back to the front and slowly steamroll your way to victory while sending additional forces to your ball.
Just practice more and eventually you will get the hang of it
. Once you get the basics down you can try using ghosts for lock down or dropships for harass or wraithplay for more fun stuff.
for a pretty good tvt watch this http://www.youtube.com/watch?v=1EIuY0WNLzk
If you do want some tips for beating the AI in tvt though here are some:
-Send out an scv early on to run around your enemies base to see if he's teching or pumping marines and defend appropriately.
-An early 2 factory build with vultures can help you get map control. Vulture speed and mines make them great for harassing and containing. Mines at your enemy nat will prevent him from expanding and killing enemy scv's will give you an econ edge.
-Expand when you have map control. SC is about as much about micro as it is about macro.
-Dropping tanks on the cliff above his main can net a gg if he has inadequate defenses.
Overall as a terran player you need to get down the backbone of a terran army, either marines&medic or mech. M&M is a bit more difficult to control than mech which is just a-move so it might be easier trying mech first. Practice slow pushing into your enemies base with tanks and vultures. A lifted engineering bay or barracks is useful for getting vision for your sieged tanks. If the opponent has a significant air force add goliaths to the mix or build turrets all around your tanks. Eventually you will want a few sci vessels for EMP against toss or irradiate against zerg, and d-matrix is always useful for units being focused. Leap frog the tanks in the back to the front and slowly steamroll your way to victory while sending additional forces to your ball.
Just practice more and eventually you will get the hang of it
for a pretty good tvt watch this http://www.youtube.com/watch?v=1EIuY0WNLzk