Lucia Ruffino took advantage of some free time during the Covid-19 lockdown in Spring 2020 to put together a video for her local Record Centre. Entitled 'Introduction to Mosses and Liverworts Recording', you can watch it on the SEWBrec YouTube channel. Highly recommended for anyone new to mosses and liverworts.
Sharon Pilkington has written a series of very useful articles in Field Bryology which are particularly helpful for those starting out in bryology, although there is also much of interest to the more experienced as well. They can be found in the Field Bryology archive, but the links are also given below.