if you can follow that for 7.1, no big change for 7.3
you may not have wizard to create track for 7.3, but it is not a big deal, just follow the note to add required sc
1. no need
2.yes
3.just follow note 669669, this is to make sure your system can recognize 7.3 sc
4yes
5 follow Note 1457908 - Required SCs for Specific Type of Development in 7.3 Track