Hola, Ramon! Welcome aboard.
Any HO scale DCC equipped locomotive from any manufacturer will run on your DCC HO scale model railroad . The same is true of non-powered rolling stock - if the couplers will couple, they'll all run together. (And if the couplers don't cooperate, just change them all to Kadees.)
For a very first layout, it would probably be a good idea to lay sectional track to a published track plan. Atlas had a plan book - I don't know if it's still available or how hard it would be to find the necessary pieces. Later you'll learn to mix and match different products. Like locomotives and cars, as long as the rails are 16.5 millimeters between railheads it will all work together, even if you might need to get creative about the way things join end to end.
You might want to look at the beginner books published by our generous hosts. Click on Shop (in the top right toolbar) to see what's available.
You are sure to have lots of questions as you venture into new territory. There's a Search Community block over there in the right column. Entering the subject of your question (eg, reversing loops,) will bring up lots of reading. Then you can ask a more specific question when you start a new thread.
I've been reaching 'way back in my memories. When I was in your position Harry Truman was president. Now I do things without conscious thought - but it took me a lot of time and work on a number of layouts to get to where I am now. The best part - it was all fun.
Chuck (Modeling Central Japan in September, 1964 - 1:80 scale, 16.5mm gage, AKA HOj)