You've done a remarkable job for a beginner! Looks wonderful!
Because of the size, perhaps you should consider sending it out for longarm quilting by a professional quilter. Candlequilter here on the board does beautiful work that she often shares with us....and she's running a great special pricing right now, 25% off! You might PM her.
I've long since given up trying to FMQ at home with large quilts after spending 8 weeks at the chiropractor following my last one!
Jan in VA