Planning on going silver but need to fix this problem

You need a very light blonde base for silver.

What have you been using to dye your hair?

This is what i used

L'Oreal Paris Preference Infinia 11.11 Ultra Light Very Light Crystal Blonde

But as I said I was no where near that colour

The only way I know of to get that light would be to bleach it, since your hair is already blonde, your half way there, you should be able to do a mild bleach bath and get to the color that you can then tone to get silver. Your going to need to let it bleach to inside of a banana peel color and then you can go for a silver toner or a lot of people on here have mixes they use to achieve the same color, I've never personally gone silver, so I don't know what direct dyes work best for that, but there are plenty of people who have shared their stories on here, I would just do a search in the color profiles for silver and you should get a pretty good idea.

I was going to suggest a bleach bath too. I never had any success using even platinum box dyes, my hair always came out straw coloured (and my hair is naturally mousey too!). It can all depend on how much pigment is in your hair and I think mine has a lot of yellow so maybe yours does too?

The difference between a bleach bath and a blonde box dye on my hair is amazing though, a bleach bath with low volume developer and a good quality bleach takes my hair to a very light blonde very quickly (though still with quite a lot of yellow tones as my hair won't seem to lose them!).

As with Emmer, I'm not sure what silver toners are best, but there are plenty of people on here who have tried them if you look in the Show Off Your Hair section of the site.