There is a wealth of information to be found about Nepal. Trekkers could well start by logging in to Trek Info which not only has links to many other websites but also contains a message board facility enabling you to find out answers to questions linked to your plans. Try also 9 Tips for Trekking in Nepal written just after the deadly snowstorm on the Annapurna Circuit in autumn 2014.
By clicking here you will find suggestions for other websites providing background information on Nepal
Finally, by clicking here you will find suggestions as to how you can support charity work in Nepal