Sorry Haz, just read and yours is a DSLR, I thought it was a bridge camera. Sorry.
You should be able to get somne decent low light shots with it. Up the ISO, use the largest aperture possible. Try and get up to about 1/30 sec shutter speed to reduce camera shake.
The 510 has an image stabilizer doesn't it? Turn that on to reduce shake further.
I have a point and shoot, and when taking pics in low light, I normally just rest it on something like a wall, or glass if in a pub, and I get pretty good shots without having to spoil them with the flash.
As JJ says you'll get much better results using full manual. Have a read of the instructions, generally they are pretty well written. There are loads of courses, but Internet and manual are the only things you really need. Just get out there and practice.
I'd try not to use the built in flash, if you have an external flash then maybe experiment, but it sounds like you need to get the basics of using a DSLR nailed first.
^^ Ain't as easy as it looks though if your a complete newbie at it though, but some of the effects are truly amazing from completely manual.
Noooooiiiiiiisssssssse
lol
Good flashes are £££ though loloh and to the r****d that said a flash will ruin your lighting you clearly dont know how to use a flash... and im not talking about the poxy pop up flashes on top of your camera as tbh you would be better off lighting a fart but a propper flash... use slow sync etc and it will improve shots and add to them... remember you dont have to fire the flash directly at the subject...
you can get a tripod for like 20 quid and it will improve your photography!
u will be dissapointed using a high iso compared to a tripod with a long shutterspeed...
learn to read and use your cameras light meter, also it can be tedious but learn how to use if your camera has it or learn how to bracket your shots, + and - one stop then review them on the lcd to get a good idea of what you need to do...
oh and to the r****d that said a flash will ruin your lighting you clearly dont know how to use a flash... and im not talking about the poxy pop up flashes on top of your camera as tbh you would be better off lighting a fart but a propper flash... use slow sync etc and it will improve shots and add to them... remember you dont have to fire the flash directly at the subject...