You have a light wind board with the GO, so I would suggest the 122. The 133 is too close to the Go and I think you will be much happier with the smaller, more performance oriented board like the 122. It should be easy to uphaul while you learn to water start. For someone your size, the 122 will be a BIG board for winds over 18 knots and you will likely want something smaller down the road as you keep progressing.
Formula 160; iSonic 111; HiFly Move 105; Tiga 263; '85 Mistral Superlight.
Maui Sails TR 11.0; 9.2; 8.4; 7.6; 6.6; Maui Sails Switch 6.0; 5.2; Maui Sails Global 4.5; 4.0.