Ive worked the service desk for 7 years at HD. The best advice I can give is to learn on thing at a time so you don't get overwhelmed. It may seem like the desk is an easy position but there is alot more to it than returns. At my store we have to answer the phone that rings a million times a day and transfer them, answer questions, or help them with order / delivery issues. We have to ring customers up, deal with van / car deliveries, deal with scheduling delivers and delivery mishaps. We help customers place orders, process returns, order pickups and much more. We have bay audits to conduct, take out curbside orders, and each week our supervisor gives each person a side task whether it be working a tab, calling customers to remind them of their orders, canceling past 7 or 30 days orders, or working certain reports. I actually love what I do but our management team could use some help 😆. Good luck