No overclocking, and this is the psu i have, cant afford new one atm.
You should be fine for the time being, but change it when you can, yours is not a great PSU.
Silverstone Strider Plus ST50F-P 500W will be enough for your system. Your psu provides current of 34A @+12V rail and your gpu won't use more than 22A and max tdp for your gpu is 250watts. Nothing to be worried, you are all good