Newbie problem with first project

Trying to set up my 40X50DIY laser and have gone through all the tutorials and have been able to connect the laser and create the project and when I preview it it looks perfect. But when I go to actually burn it, it is very slow and overburns. But no matter what I set the speed at it is the same very slow speed. I don’t know where the problem is. Did I hook it to the wrong type of controller? I admit to not knowing much about the controller but assumed it was a nano. The software it comes with works fine but I would like to use this software but I only have 12 days left on my trial. Help. BTW, it is GRBL 1.1z.

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