Hi all,
I'd start by going looking for suitable trees. If you want interior "trees", you could buy plug plant
Serissa foetida or Ficus benjamina. From the earlier Bonsai thread
Carmona microphylla looked very good if you could find it
http://www.ukaps.org/forum/viewtopic.php?f=24&t=14012, I've seen Ikea as a suggestion.
If you want a Bonsai for outside, now is a very good timer to go tree seedling hunting. Gravel paths and demolition sites are very good for conifers,
Cotoneaster horizontalis, Birch (
Betula pendula) and Holly (
Ilex aquifolium) seedlings. If you can find a fairly straight sapling about 75cm tall, that is ideal. I'd wait until it has rained before removing it. You may find you can get
Acer seedlings as well. I was at Westonbirt Arboretum recently and they had some really nice
A. palmatum (Japanese Maple) seedlings.
All you need then is a book (or a forum?), a pot, some Tesco's cat litter, scissors and training wire.
cheers Darrel