To check if your words are a brainwallet.

Load this page:

https://web.archive.org/web/20131031041506/http://brainwallet.org/

turn off internet.

type words,

copy words and address into text file.

repeat for whatever you think should be the right combination (8 words, 8 words plus password, etc)

save text file.

restart computer.

load text file,

check addresses at https://www.blockchain.com/explorer

If you find the address with the bitcoin.

You can start at step 1 to enter the words to get the private key.

copy private key.

You can import the private key into a bitcoin wallet  (like electrum, available from https://electrum.org) to access your bitcoin.

if you don't find any bitcoin, it's probably not a brainwallet.