If you have not made your ring(s) yet,,,,,,,,Plain sterling silver rings are fairly easily made by buying round or half-round or other shaped sterling wire of the appropriate weight. Cut length, bend around ring mandral or item of correct size, silver solder & finish. Some fancy patterned ring wires are available too.
Remember that to anneal copper, silver, sterling, gold, etc., you heat & quench, opposite of steel. Also, as said by someone earlier, keep silver stuff clean and solder joints tight or they will not solder.
Try Tripps or Rio Grand or Indian Supply, etc. for supplies.
Have fun.