I would say go ahead and try it. My daughter just turned 10, but when she was little I started potty training her when she turned 1 yr old. I didn't use a potty chair. I bought a padded seat with little handles that fit right onto the toilet. I had ordered it from a company back then, but nowadays they sell them at WalMart,Kmart,and such. The second time I put her on she peed and I clapped and praised her so much she was smiling. I guess after a few times she caught on mentally that mommy was so proud of her, eventually she started clapping too. She would crawl down the hallway to the bathroom(she didn't walk till she was 15 mths) pull herself up and tap on the lid to let me know she had to go. It does take time and you have to have lots of patience. The big thing is not to expect them to go everytime when they first start. If he tries and doesn't go still praise him with something like 'good try buddy, we'll try again later'. Though I started when my daughter was 1, she didn't master it until she was 18 mths. I started putting pull ups on her during the day and still a diaper at night. That only lasted a week. She stood dry throughout the day so I bought underwear for her. I kept a diaper on her at night cause I figured night training would come later. But she suprised me a couple weeks later when she started waking up in the night crying cause she had to go pee. After another week or so of her staying dry at night too I left her in the underwear at night. She was completely potty trained, underwear day and night, no accidents, by 20 mths. Yes it did take some time, but I expected it would since I started so young, but I also thought of it this way, all the money I saved not having to buy diapers anymore! I worked in daycare for years and so I've 'helped' potty train many kids, boys and girls. I can say from personal experience that it is much easier to potty train when they are under the age of 2. The most difficult ones I potty trained where the 3 yr olds. My niece, who I watch everyday is 18 mths and I will be 'helping' potty train her shortly as well.
Good luck J.!