Trouble explaining IT? Have you ever done a work experience outline for a job application? Use something from that.
"I manage 5,000 computers for a school district in a small suburb". "I work in a skyscraper, maintaining computers for 500 employees at a financial company. I specialize in hardware". I deploy software such as "insert recognizeable names here".
Or even simplify it from there. "I create website content make sure that those company websites function." "I make sure that everyone can send email."
You don't have to explain computer science to them. Most people can understand broad concepts like "manage", "maintain", "fix", etc.
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To the people who hate the gym but want to get their body moving:
The gym is a strange form of discipline where the typical activities aren't classically "fun". And you sort of learn to appreciate it, as you force yourself to go and start to get better. You eventually end up addicted to the way you feel (better, stronger) and your ability to complete the movements which result in those feelings. you are pretty much shortcutting your reward response.
It's totally ok if you don't like it. There are many ways to move. Don't be the person who lays $50 per month, to use the treadmill.
If you wanna walk or run, go walk or run. Buy the right gear, to keep you doing it through most weather. You can take different routes each time. You can drive somewhere special and do your walk or run, there.
There are lots of ways to exercise, with just your body. You can go out into a field/park/backyard/etc and do any numbered of varied bodyweight exercises, yoga, martial arts, etc.
Having a partner or team, for any of it, can be great. But, finding individual partners to start with you, can be tough. Try to find someone who is already well into it. They will be exponentially less likely to flake on you. Could be a friend. Could an associate. Could be a random at the gym. Strike up a convo, get to the point.