How to keep pieces advantage?

How the frick can you "stick the ice pick into the ice"

how do you keep an advantage when the pieces are very valuable and vulnerable from blunders and tactics because when i try to reduce the risk by trading my opponent refused,

it is insane that i lose when im up a whole queen and a rook

the only time when i win is when i found quick checkmates and forced trade (their minor pieces is stuck so they have to trade) any advice and tips?

When up material, trade pieces, not pawns.
An endgame with an extra pawn is won: the plan is to queen the pawn.
An endgame with an extra piece is won: the plan is to trade the piece for a pawn.

The right way to trade pieces is not to chase for trades, but to put your pieces on active central squares so your opponent wants to trade them.

When up material: attack!
When you are up material the defender cannot match all of your attacks with defences.

When up material keep focus and play slowly and carefully.
You do not want to blunder.
Always check your intended move is no blunder before you play it.
A won game is the hardest game to win.

Thanks for the advice