Amish I went to Handymans Tips and this is what they had to say about the mortise chisel.
Mortise chisels are heavy chisels, thicker than they are wide, with giant forged bolsters and oval beech or oak handles to take pounding. However, you will find them very easy to handle and a joy to use. You will basically need just one mortise chisel ( 1/4″ or 3/8″ being the most common) and size all your mortises accordingly.
See bud, mortise chisels are very easy to handle and a joy to use. Handymans Tips said so!! Maybe you should try the Tin Cup method. Put all your change in your left pocket (promotes balance), grab largest BFH (promotes confidence), place carpenter pencil behind right ear (look the part be the part), study chisel as if searching for some thing most miss (promotes confident appearance), unpack $1000 mortise machine and continue with project.
Just picking at you a bit bud. Im sure you will get a handle on this pretty quick. This is one joint I havnt tried yet but plan to soon. Good Luck!!
Everything i build comes with a redneck warranty. If it breaks you get to keep both pieces.