I believe I am enlightened now by the Holy Spirit, as the Lord indicated to His disciples the Holy Spirit would provide them illumination.
As to whether I am sealed with the Holy Spirit, it will be dependent on me whether I repent of my carnal ways and choose the Spirit, or whether I choose the flesh and reject Gods Holy Spirit of enlightenment.
Once I have fully tasted the good that comes from full enlightenment from the Holy Spirit, if I should then choose the flesh, I would then obviously not have been OSAS, and sealed with the Holy Spirit (Hebrews 6:4-6; 1 Peter 2:2-3). By the way, can you see what the context of Gods grace is in 1 Peter 2:3? It is in context with the milk from the Holy Spirit by which we grow in 1 Peter 2:2.
Hebrews 6:4 For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost, 5 And have tasted the good word of God, and the powers of the world to come, 6 If they shall fall away, to renew them again unto repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame.
1 Peter 2:2 As newborn babes, desire the sincere milk of the word, that ye may grow thereby: 3 If so be ye have tasted that the Lord is gracious.