I never personally worried much about my background (living in a small space means I don't get to choose :D). You could try to spice up talks with a fancy screen or a whiteboard with personalized message, but don't feel pressured into having a bookshelf wall behind ya.
Practicing speaking in a virtual environment helps you feel way more comfortable giving talks from your desk. What helped me was hosting webinars for clients and internal workshops for colleagues that gave me good practice! You could also record sessions for yourself!
Always record your talks! ⏺️ G Hangouts, Zoom, etc. all have this function. Not only is this excellent, easy content to publish, but you can also use it to keep growing your subscription lists. Also: try to rewatch the recordings to see how you can improve even more!
Entertain and converse with your audience 👭 WFH can be lonely, so webinars these days should also be more personable. Be open, ask questions, and engage listeners with polls or quizzes (e.g with Mentimeter). Having these personal moments really makes talks shine!
Also - if you have an online conference / meet-up / webinar series and are looking for speakers - let it be known! 😊🔥