2007 Honda cbr 125 cut out while riding and is now dead?

Sorry if this is a tad long…

The past couple of days when i turn my turn my key to start my honda cbr 125 its had a delay before anything happens (like 5-10 seconds until dashboard turns on). Today on my way home from work my bike randomly cut out at 30mph on a busy road! I tried to turn the bike back on but nothing!
so i walked it down the road to a small carpark to have a quick look. I finally got it to turn on but wasn't ready to go (helmet, bag and gloves off) so i turned it off again. When i tried to start it again… NOTHING! Eventually on my long walk home i tried it one last time. It started so i hopped on and got home. Now the bike will not turn on at all! I've charged the battery but i'm a complete noob tbh. Only been riding a few weeks. Any ideas as to why this is happening? Would spark plugs cause a cut out? My friend says that litterally just starts the bike so won't cause a cut out?! Other things i have read is the carb? Likely? Or not?

Thanks in advance!

Added (1). if its electrical is it going to cost a lot to get repaired?

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