Test is great for a first cycle but which one depends on a few factors of personal preferance.
With test enanthate or cyp you can inject once or twice a week. Once is really fine but then you have an issue of volume in the syringe. I prefer 2x a week. It will take a few weeks to build up to noticeable levels and will also take a while to clear your system making your PCT start date a little convoluted.
test prop is much faster acting than the afore mentioned and also clears faster so it is easier to gauge when PCT should start but needs to be pinned eod. There is also some pain at the injection site, moreso at least that enan or cyp.
Now Sust is an odd bird in that it is a blend of multiple length esters. It's shortest, prop, is at a pretty low level to really see it's benefits and the longest, Decanoate takes longer to kick in and clear than enan or cyp. This makes it a little more difficult to determine the most effective pin schedule, estimate when stable blood levels are reached and when PCT should start.
Personally, I prefer more control than Sust offers and more diversity than enan/cyp or prop offer alone and do something like this:
Test enan 300mg 2x ew weeks 1-12
Test prop 100mg eod weeks 1-3 & 13-15
PCT weeks 16-19 or more
The enan give the benefit of stable release with few injections and the prop gets me going to effective levels in days at the beginning of the cycle and keeps it up at the end while the enan ester cleaves off and slowly clears my system.