Hi Sandyland,
Welcome to the forum, you might want to have a look at the following FAQ which explain where everything is
Welcome to Benefits and Work If you are over the age of 16 and were under 65 in April 2013 then you should expect to be 'invited' to apply for PIP.
PIP was deliberately made harder to get than DLA and the criteria are different. This is all explained in the PIP guide, which should be your first port of call.
PIP help for claimants May I suggest that you bookmark/favourite this on your web browser now so that you can find it easily in future? This will allow you to return with further questions or comments about your PIP without having to start a new topic each time. We ask members to keep everything relating to the same claim in one topic as it helps us enormously - and I hope you will find it useful too