You can choose to hold live (synchronous) class at a scheduled time with students online together, or offer a pre-recorded (asynchronous) class that students can access at a time that works for them. You can also choose a mix of both.
BYU has institutional licenses to products such as Zoom that are free for professors and students. Detailed training is available at https://go.byu.edu/zoomtraining.
Video tutorials for getting started using Zoom are also available at support.zoom.us.
Audio quality really matters. Consider getting a decent microphone and experiment with gain/other settings to make sure that your signal (your voice) to noise (other background noises) ratio is good.
Use multiple screens. You can continue to use whatever presentation software you are comfortable with.
Try using one screen for the "presenter view". This allows you to use notes, prompts, a preview of upcoming content, timer, etc. as you present, while students just see the slides.
“I used Google Slides to present material. It worked well. You can put the presenter-view panel on a separate monitor with the presentation on screen you are sharing with students.”
Try moving your Zoom controls and other materials to a second monitor.
“I presented from my office... and having LOTS of screen-estate was a big help so I could have presentation, notes, Zoom window, student view, and chat view all up at once.”