I also just got the Juki and I LOVE it!!! My FMQ has already improved and believe me, I thought I just wasn't going to get it. I'm still practicing and haven't done the things you have yet.
Love the bobbin winder. Wound a whole bunch of bobbins I got on Ebay. If you need any let me know and I'll direct you to the place I got them- 100 for just a tad over 20 bucks .
Got the needle threader after watching Youtube- it's not the easiest but I finally have it down.
I watched The Crafty Gemini's 6 videos on FMQ with this machine. They were extremely helpful.
Glad the walking foot is working for you. I haven't used it yet. I don't do that style of quilting much.
OH- I got an awesome FMQ foot on Amazon for 12 bucks- it's larger and has an open toe. I prefer that, others may not.
I don't know about Walmart's oil- I don't shop there, just be sure it's good quality. That's important on any machine.
Have fun!! I am