Teacher = natural or spiritual mentor; the Holy Spirit; Christ
Teacher’s brother = several who are united as if members of a family?
Store (warehouse) = large church or congregation?
Rainbow = the revelation and the glory of God.
Car = personal ministry or motivation (life).
God is perhaps telling me that I have a natural gift or calling for teaching or mentoring others with the revelations that He has given me. I may be asked in the future to be part of a larger Christian ministry but God may be telling me that it may be best to be on my own more as a small personal ministry