The more you do it the better you'll be at adjusting. Just jump in there and do it! Take a picture of it or make a reference mark on the bobbin case before adjusting. Both feet...just jump...do it! It's one little screw, every one that sew needs to learn to do these simple adjustments themselves, you can do it! Just a quarter turn at a time. Remember righty tighty, lefty loosy...before you know it we'll have you setting your timing on that scary machine!....LOL! Whats the worse thing that could happen? Really? No fear, There's nothing to fear but fear itself! Tell fear to take a back seat, you're a woman on a mission, and the mission is perfect tension. So loosen up YOUR tension and be FREE from the FEAR of thread tension! You know you want to, don't let the naysayers win, your independent and adventurous spirit wants to turn that screw. Its one tiny little turn on your path to stunning award winning quilting. Now get in there and show it who's boss!