The English-born Wanganui YMCA furniture-making tutor gained automatic entry into the New Zealand team, with no other fighters available in her weight division, at the national championships last year.
Before leaving Wanganui for Malaysia, Fuller conceded she was an underdog at the world championships, but said she had changed her life to make the team to compete at such an event.
"I know what to expect now. I might have only won bronze last year, but it was a real honour to even climb into the ring with a world champion," Fuller said.
"I have only had one fight since the worlds last year and lost to a heavier and a lot taller fighter at a show called 'Honour' in Wellington this year. She was a pretty good fighter. The match went the full three rounds and I lost on points. It's difficult to find opponents my weight in New Zealand so I have to usually concede both weight and height, even in training.
"I feel I have really improved my skill level and fitness from last year and I now have three weeks serious training before flying out to Thailand on August 1. We go into a training camp on August 6-12 and then competition starts on August 13. The finals are on August 23."
The 33-year-old said she was blessed to be heading to the world championships in the home of Muay Thai and this year was especially significant with the Thai royal family hosting the event.
"Each of the royal family, including the king, are putting up trophies in each of the divisions and I am definitely pushing hard for a podium finish.
"I probably won't get many other opportunities like this again and I would love to have something to tell my grandchildren," Fuller said.
Fuller has raised about $2000 of the $5000 she needs for the trip and is hoping business houses, groups and individuals get behind her bid for a world title.
People can still donate to Lou Fuller's trip at givealittle.co.nz/cause/getloutothailand or through her fundraising page on facebook.