It's fine to introduce allergens in a home setting if you don't feel there is a cause of concern. There isn't anything you can really give for an acute reaction under 2 years of age, which is why some people (especially anyone with a history of allergies in the family) may choose to introduce it at the hospital so they are right there at emerg if they need treatment. That said, most initial reactions likely won't be life-threatening. You'll more likely see signs like a rash around the mouth, gastro distress, etc. Allergies get stronger over time with each exposure. So unless you feel there is a cause for concern most should be safe to do at home (may want to be careful with introducing wheat and dairy, of course). There's lots of weaning advice online but just take it one day at a time, take it slow, and follow your kid's lead. Baby-lead doesn't have to mean "straight to pork chops" - weaning should be led by the child and what they are comfortable with. Start with one food a day and have fun with it!
You can introduce new foods alongside "safe" foods, just be aware that trying to go to full meals right away may be overwhelming for baby. Some do much better with just one or two foods at a time at first, mine included.
I was taught to introduce the blander veggies first so we had broccoli purées for a couple days and then cauliflower, peas etc and then we moved to the sweeter veggies like sweet potato, carrots and sweetcorn. We did purées for a month and then I would mash his food but offer him a whole piece next to it so he could try both. By 8 months old my son was on 3 meals a day, all BLW, hasn't disliked anything we've offered and he's smashing it
Firstly I would say don't put pressure on yourself! Secondly, Have you heard of the app solid starts? There is a free version and you can obtain info on how to cut and serve certain foods , based on baby's age etc Also Ella's kitchen have a great website and weaning guides! Also i don't know if you uk based but children's centres are great and some hold weaning parties 😉