Hello and welcome to HCM
In my personal opinion it is better to consult a specialist than to go for steriods injections. It is to be decided by seeing your X-ray and clinical examination of the knee whether the injections is going to relief you for a time period or not or needs a permanent treatment for this like Total Knee replacement
In some cases injections only give relief for a little time period and than again you are in same pain as you have earlier.
So its better to take a expert advice for that.