Hi - I'm older than you but there are a few in their 20s on the board - I just finished radiation and chemo a month ago.

Radiation is not fun but it is doable - its a hard path to walk and yes by week 3 you'll likely need some help at home and with the children. Fatigue is a big issue as is pain depending on how bad your mouth and throat get. (assuming they are radiating the neck area)

Make sure you get flouride trays and see a dentist before hand just to be on the safe side.

Remember to slather on the cream after radiation before bed etc... This helps your skin.

See If you can get a prescription for magic mouthwash - you'll need it at some point. Try to eat as long and as much as you can - and drink too. It may not be easy but it's important for maintaining your swallowing reflex.

Stop any antioxidants you may be taking now. They work against the radiation.

Carry your baking soda and water mix with you - I used to rinse right after treatment and put my cream on on the bathroom.

In the summer months keep the radiated Skin protected from the sun. Scarf, hat etc...

You should be okay - just explain to the kids you're going to be a little sick for a bit but you'll feel better soon. Kids do get it.

I'm one of the people on the forum who used Manuka honey - it helped me -look it up and check with your dr. It may help you.

I know it's hard - but you will make it through. Nothing will taste good for a while, but eventually your taste should return mine is back about 20-25%
You may lose some hair - I did but it's no biggie.

If you are going to have a peg - still try to swallow daily.

Get a baseline tsh blood test so you know if your thyroid is affected.

Take care and if you have any questions feel free to pm me.
Best of luck.