DC means defined contribution. It means you make contributions each month and these are invested and you get a pot of money at retirement. There is no guarantee of a specific amount of money or income at retirement. What you get will depends on when you retire, how much you put in, where it is invested and what sort of investment growth you get on it.
my advice would be:
read up on pensions so you understand what you’ve got and what you can do with it at retirement.
try to come up with a rough estimate of what you will need in retirement. A good starting point is what you spend now less any debts. Then adjust as needed for your own circumstances.
work out what level of investment risk you are happy to take - higher risk means potential for higher returns but also more potential for big drops. There are lots of online risk questionnaires which can help you with this.
use a pension projection calculator to work out what current pot plus future contributions will give you at retirement. You will need to make an assumption on the % return - this will depend on your risk level as per previous point.
Does this match what you need? If not then the options are:
Reduce what you will spend in retirement
Retire later
Increase contributions
Increase the amount of investment risk you are taking ( I would only do this last and if no other option as you are increasing the risk of big falls in the value of your pot)
Or any combination of these depending on your own circumstances.
and remember you do have plenty of time and it’s good you are thinking about this now.
if you can afford it, an IFA can help you with all of this. They can also look at your existing plans and see if these are suitable with regards to charges and what funds you are invested in.