I would not recommend camping alone if you have not camped before. There is quite a lot of multitasking - in a group of 4 adults often every single one works simultaneously for an hour or so when we reach a campsite - and you could find yourself trying to do things in the dark (which is dangerous) or when you're too hungry to think straight. Next thing you know you've tripped over something and sprained an ankle, or burned yourself, and you don't have any help.
Make sure you're capable of putting up your tent and that you know how long it takes. Make sure you're capable of lighting your stove. (You can practice these in the backyard or possibly in a park, though you might get a visit from someone who thinks you're trying to actually camp and tells you to move on.) Make sure you stop early enough each day to do everything that has to be done before dark. When planning your route, take into account that you may walk more slowly (carrying a heavier load) or need more trips across portages. You may also just stop to stare from a lookout, or to watch some wildlife, or various things that you wouldn't do if you were with someone. You should know what order things have to be done: unrolling your sleeping pad and bag and getting your flashlight out of the pack can wait until after you've made dinner, but getting a tarp up to protect from the rain that's coming probably can't.
Also, imagine you're canoeing with a partner and you suddenly need to pee. You and your partner paddle to shore, you jump out and go as far inland as water protection and privacy require, then you come back. 5 minutes. But if you're alone, you'll need to find a place where you can tie up the canoe and leave it unattended without having it tipped by waves or washed away. Maybe pull it up on shore a bit. You'll need to dig out some rope to tie it to a tree. This all takes time. Same when you're at a campsite, you can't just pop out to gather some wood for a fire, you have to secure the campsite (at least to stop stuff blowing away) and pick up the things you need to take with you (cell phone, emergency kit) rather than just coming and going as you please and yelling for help if you need it.
Most people who go camping suffer nothing worse than blisters and sunburn. I find that if people are going to get hurt more seriously, it's when they're tired, hungry, grumpy from their blisters and sunburn, or when it's dark. Going alone significantly raises the chances of all those things. So allow more time, and look after yourself.