Not a sling But TUSHBABY was a lifesaver for me. It’s a hip seat and takes the pressure off your back/neck/arms. There’s other brands on Amazon like Bellababy that are cheaper and also have the removable harness part (I loved this) so you and your kid can be totally hands free. I really recommend this over a sling for you and baby’s comfort. I kept one in the car also to easily run into a store without having to use a stroller or have your hands full. There’s a storage pouch on bellababy for phone/keys/wallet.
I have this one. I like it for my 2yo, but he was already 2 when I got it, so I don't have experience using it with an 8mo. https://www.amazon.com/stores/Shiaon/%E4%B8%BB%E9%A1%B5/page/4F17F419-5887-4E4D-BCC9-014B032DB88E?ref_=cm_sw_r_apann_ast_store_BJFK69DS03JKDZ641T31&store_ref=bl_ast_dp_brandLogo_sto