There are many organisations in Scotland who can support you in growing your own food, from providing advice on setting up a growing group or allotment society, to identifying and accessing land, funding, what to grow and how, and educational/social aspects of growing.
Social Farms & Gardens
Central Scotland Green Network Trust
Keep Scotland Beautiful
Scottish Allotments and Gardens Society
Royal Horticultural Society
Community Health and Food Scotland
East Dunbartonshire Council
Community Land Advice Service
Royal Caledonian Horticultural Society
Other support organisations:
Community Planning Partnerships
Forth Environment Link
Scottish Land & Estates
Development Trusts Association Scotland
There are also many small or community based groups, who operate on a very local level who it might be possible for you to join with.