Welcome Hoggy,
2 thoughts:
1) Best thing I ever did was to go on a track day with an instructor session. The car's limits were way beyond mine on a smooth track.
2) It's your Morgan - as long as you are not labouring it in too high a gear (which can cause engine and clutch damage), I suggest you drive it how it feels most comfortable to you. The more miles you enjoy, the better you will understand how best to enjoy your car in your way.
