Keep in mind that not ever non-catholic is reformed in theology (I'm not), but all the major beliefs overlap. It's a start for you.
Answer The Lord’s Supper is a sacrament, wherein, by giving and receiving bread and wine, according to Christ’s appointment, his death is showed forth; and the worthy receivers are, not after a corporal and carnal manner, but by faith, made partakers of his body and blood, with all his benefits, to their spiritual nourishment, and growth in grace.
This is a great link, aMPU. Thank you for sending it. I will be glad to familiarize myself with your catechism.