New to MacBook and having issues

Hi
I have recently bought a MacBook Air and I am having problems using the trackpad commander when voiceover is on. It skips lines and jumps about the menu. There is also a lag. I assume you can use the trackpad gestures as well as the keyboard commands without any issues or do they conflict? Apple did a clean install and I am still having issues. I am new to using a Mac so I’d appreciate any advice. Thanks.