Ortega is quite easy to learn. I've learned it in one day with my outdated brain hardware
The OLL algs are short and sometimes the same like 3x3, the PBL algs are also very short and the longer ones you already know from 3x3 or beginners method.
Maybe it's good to watch a video. On the Alg Sheets I didn't fully understand it until JPerm told me to watch for bars
The most important is to do it color neutral because there is (almost) always one easy side to begin, but you don't have to remember the color scheme.
Its enough to know the opposite colors.
Still the biggest problem for me that keeps me from good times is to recognize the bars fast enough