When trying to figure out God's intent in a dream that might be from Him, it is important to stay in tune with what He has already given you -- His Word.
Do a search for thrones in scriptures. Authority, sonship, reigning, royal priesthood, and other related terms. Your message is already there.
2 Timothy 2:11+
For if we died with Him, we will also live with Him; If we endure, we will also reign with Him; If we deny Him, He also will deny us; If we are faithless, He remains faithful, for He cannot deny Himself.
Revelation 5:10
"You have made them to be a kingdom and priests to our God; and they will reign upon the earth."
1 Corinthians 4:8
What does it mean to reign? At first glance it seems the pinnacle of everything you could wish for -- fame, fortune, respect, adoration, servants at your beck and call. But a king is much like a business owner -- they live in a fishbowl, get blamed for everything, have to make sure the budget doesn't go over, has to keep invading armies from sneaking over the borders, has to determine whether newly employed knights can be trusted...
It's a lot of work to have a throne.
While God expects us to humble ourselves continually, He also entrusts us to be public servants. With this assignment comes responsibility. Find out what that might be!
The portal is your choice. Where will you allow Him to take you; and to what ends are you willing to go?
Lk 12:48 For unto whomsoever much is given, of him shall be much required
1 Pet 5:6 Therefore humble yourselves under the mighty hand of God, that He may exalt you at the proper time