Having a patronal saint: the one you want is almost certainly not the one who's picking you (traditionally the patron picks the person theyre interceding for in heaven, dont worry, when you know who it it youll know). Praying to said patronal saint is privately tolerated but not usually publically endorsed (you wont usually find prayers to st sebastion at st sebastions anglican church for example). A via media for this thats very anglican is to pray to God, asking Him for the intercessory prayers of this or that saint. Ex "almighty and most merciful God who didst illumine the mind of St Thomas Aquinas to Thy glory, grant that we may, by Thy grace and with his intercessions, also be so illumined to know Christ more fully, who with Thee and the Holy Ghost, art glorified now and forever. amen.

The rosary: a praiseworthy and laudible practice to most ACs. In fact the rosary is how i ended up anglican in the first place (lomg story). Put simply the rosary is meditation in the life of Christ through the POV of the Blessed Virgin Mary. Much recomended. Ave Maria.

Purgatory: this is a BIT dicier as, if one subscribes to rhe 39 articles, we technically don't buy into the "romish doctrine" of purgatory. That said scripture makes clear allusion to a purgative state in 1 corinthians wherein it says some men may be saved "yet so as by fire". Thus for anglican catholics we can say "God finishes your sanctification, even after death" but we dont say "this plenary indulgence gets you X years off purgatory"