After about 30 years of enjoying mainly landscape photography as a hobby, I have recently been shooting some events for my company. The first time I was 'begged' to take pictures of an event where a motivational speaker came in and did a talk to about 150 people. I reluctantly agreed. This was held in a room with partially mirrored walls and a large number of pillars - it was a horrible introduction. I found it very challenging and soon realised that I was out of my depth. The lighting was horrible and because of the potential disruption to the speaker and the mirrored walls I decided I couldn't use my flash. I was not that pleased with the results, but the company were pleased with the shots I had taken. I later thought, well the company are happy with them and as a photographer it couldn't have been more difficult !
I have since done a few more easier ones and have now started to enjoy the experience. I recently took portraits of about 300 staff for the company online directory, which I found very enjoyable. I had never experienced taking portraits of so many different people, some with dark skin, some with light skin, different coloured hair, some with spectacles, some without, some old, some young, but I learnt a great deal from it. In some ways the people I shot put me the photographer at ease and I learnt a great deal and my confidence in my own ability has vastly improved. I was pleased with the results.
I enjoy photography as a hobby, and do not consider myself a professional but as long as the company and I work on that understanding they shouldn't expect a top notch professional job from me and will have to understand my limitations (also I am usually doing it in my own time and I'm free of charge). It is not my day job that they pay me for, but they are happy as in my own way I am saving the company money. They are happy, I am happy, it's a win/win experience as far as I am concerned. I am enjoying the experience and consider it a good learning opportunity. I am learning more and more as time goes on.
So I say - just go for it, you will find it stressful but it's a very rewarding experience.