Hi Sary!
Senegal owner... actually owned myself! At 9 months they're in a delightful stage called 'Weanling.' Don't hold his beak. He beaks because he has one. He's at the stage in life where he doesn't know his own strength.
Regarding your skin - earlobes, knuckles, lips, etc. Rather than say NO, say SKIN (in the same tone as NO). Combine it with the shoulder/hand tremor (minor up/down shake to catch off balance but not make him fall). Though, regarding your lip - do so only when he's not attached. Also, when you use your lips, say Kiss before you do so. He will soon learn to 'kiss.'
The reason the SKIN word works is that it's a lifetime command. Get him used to it now. When he's just cuddling or beaking you nicely (and beaking is natural), compliment him. You can control the beak.
As for jewelry/fancy hair gadgets - this is a no-win situation. Don't wear them around your fid. It's actually an exercise in futility and it's not trainable.
Also, don't let him near wood items, blinds, wires, etc that he can't chew on. You need to adapt the mentality that you have a toddler with a can opener attached to his face. Again, this is untrainable.
There is no such thing that they can discern between 'good' wood and 'bad' wood. Wood is wood. It's up to you to remove the 'bad' wood (eg, your expensive ones). The same goes for metal. Your silver chain looks exactly like the chains hanging some of his toys. Your fid cannot decipher the difference. (And, you will run into other trouble trying to make them do so.)
I'm sorry if I'm not more sympathetic but the things you are complaining about come into the category of don't expose in the first place. Fids naturally chew. My Senegal peacefully co-exists in the same room with 3 valuable antique tables. The reason, he doesn't have access to them. I keep his wings trimmed and he has the full run over his area.
My advice is to use the Skin command (to shake him into going gently and reward him when he is gentle) and to not put things that you don't want him to chew within the path of his beak. He shouldn't have the run of the place.
Essentially, your ideal is to always put your fid in a place where you don't need to correct behavior. Regarding skin, they need to learn a 'good' beak from a nip (though keep in mind, not all bites are bad bites). However, with wood, metals, and wires - you're fighting a losing battle. They need wood and climb on things that look like metals and wires. Place only the things they can chew on within their beak reach and remove the rest.
One thing - are his wings clipped? If not, they should be - and take him to a vet/experienced groomer to do so.
