Should be fine... The Helfrich should not be too aggressive during feeding...
Beginner seahorses would be H. Reidi and H. Kuda.. I wouldn't recommend H. Comes because they are notorious for not eating even though they are cheap.
H. Reidi is expensive but they can swallow freshwater shrimp as they have big snouts and that is a plus point when you are training it to eat frozen..
H. Kudas is in affordable range even for yellow /red ones... With more captive bred kudas from Aussie and Vietnam, It is easier to get them feeding.. Will ones are a bit harder to wean on frozen...