@HollyMollyDolly Others have explained it in clear general terms, so not going to repeat what has been said. Except to clarify someone else's response about timings in Elections. An election can be called at any time at all, and no minimum time has to elapse after a previous election - but it has to be called absolutely NO later than 5 years after the last one. As the last election was held in December 2019, one had to be called sometime this year.
But how it will affect you, in your day to day job will depend on exactly what your role actually is. It's not a silly question if you don't know the answer, especially if you suffer from anxiety.
Work may be dropped until after the election, additional work may be needed, legislation will be paused and above everything else, people have to be VERY careful not to say anything of a 'sensitive' nature or anything which might impact on the result of the Election until after the results are in
But, as I've already said, it might not impact you very much, depending what you do.
Civil servants are defined as politically impartial, appointed officials of the UK Home Civil Service, which supports the work of the UK's central government departments. This includes agencies that employ civil servants such as executive agencies, non-ministerial departments and some non-departmental public bodies.14
Those working in the Parliament are not classed as Civil Servants and their work could be greatly impacted with a change of Minister they work for etc.
I worked in different departments of the Civil Service, over many years. It didn't impact at all when working in various areas dealing with members of the public (think something like paying out benefits, Or other things like working in an IT department). On the other hand, working in a policy job was more impacted, depending on the stage of the policy, whether legislation is in the middle of being drafted etc. etc.
If you're still not sure, I suggest you ask your line manager whether it is likely to impact the work you are doing? I wouldn't suggest to them that you know nothing about Elections. Just a simple - is this going to affect what I do for the next 6 weeks? But you may be able to work that out for yourself, without showing how much you don't know!
Good Luck