I’m a lvl10 sorcerer: should I plan for Spell Sniper + Eldritch Adept to get a powerful cantrip?

I’m currently a level 10 Tiefling Sorcerer, playing my first game of D&D (5e). I’m mostly selecting spells for boon’ing party members, with a couple of save-or-suck spells in reserve + simple damage output (e.g. Chaos Bolt + Fire Bolt). I’d quite like to have a more chunky Cantrip, e.g. Eldritch Blast, but I’d also like to hit level 20 Sorcerer, too. I already have the Observant and Ritual Caster feats, and 20 Charisma as a luck did have it when we rolled our characters, too.

Draft plan: Level 12 Spell Sniper (Eldritch Blast) + level 16 Eldritch Adept (Agonising Blast)

An artificer in our group is providing me with a Mind Sharpener set of robes, so I don’t think Warcaster is necessary until potentially late game.

Thoughts, comments, shaming, critique?