//////////////accept the Call!  Your "testimonies" will envelope your heart as you progress, and your bishop will be there to help as will those you will be called to serve.  You're headed in the right direction, I know, for it happened to me, and I too thought, "I'm out of my depth here".   Maybe I was, but I'm getting better after several more calls where I was out of my depth.  You will do awesome I know, because you want to do good.  Each calling will add a new testimony, I promise.

I think . . . I think whatever calling it is, the truth is you are going to end up having a blast.  I never, ever wanted to be the music leader in the children's Primary; that was my Fear Factor job.  Well, I was called to it.  I learned to love it.  Later, I had that calling again! and that time I knew I was going to be having my best, fun job!  I would do it in a heartbeat again.

Here is supporting thoughts going your direction.

This calling could be what helps build your testimony into what you know it can be. We are called to callings because we need them not because the Lord needs us is what I was told. I hope you pray and study to find your answer.

I just read this today...

"We also need to support and sustain our local leaders, because they
also have been 'called and chosen.' Every member of this Church may
receive counsel from a bishop or a branch president, a stake or a mission
president, and the President of the Church and his associates. None of
these brethren asked for his calling. None is perfect. Yet they are the
servants of the Lord, called by Him through those entitled to inspiration.
Those called, sustained, and set apart are entitled to our sustaining
support."

Topics: Church callings, inspiration, Church leaders,
guidance

(James E. Faust, "Called and Chosen," Ensign, Nov. 2005, 54-55)

Just know that your bishop's calling was inspired and that he will work with you in continuing on that road towards our Heavenly Father.  As you are open with him and with the spirit, both you and he will receive that testimony from the spirit of what you should do.  Every calling is important, even in the nursery or as a door greeter and it's an opportunity for growth, "all these things shall be for thy learning and benefit"...or something like that.  The Lord has a plan for us, He knows if it's too soon and He will communicate through the spirit.  Who knows, this may be what you need!