Am I too late in opting in for the alpha?

My specs:

Primary computer
OS: Windows 10
CPU: i5-4670k@4.4GHz
GPU: R9 290

Plex/media server
OS: Windows 10
CPU: FX-6300
GPU: GT710

Trading laptop 
OS: macOS High Sierra
CPU: i5-5350U

Phone
Samsung Galaxy S7