Dennis Wise has been installed as Swindon player-manager after agreeing personal terms on Monday.
Wise led Millwall to the FA Cup final
The 39-year-old will be assisted at the County Ground by former Chelsea team-mate Gustavo Poyet.
"I have been impressed with Swindon in the meetings we have had and liked what I heard," Wise explained.
"There will not be loads of money to spend. I have targets I would like to bring in and we will have to wheel and deal to a certain extent."
Wise says he and Poyet will register as players and be available to play but hopes they are not needed.
"I want a fit and strong side because once you have that you have a mentally strong side and that will help us no end.
"I am sure the players will do well for us and keep us out of the side but because we will have a relatively small squad the option will be there."
Former boss Iffy Onoura was offered the chance to stay in a reduced capacity but has turned down that opportunity and has left the club.
He said: "While I am disappointed, I understand that the club want that big name to put bums on seats early in the season, which is important.
"My argument was, and still is, that a longer term stability was important to the club. The club wanted to go a different way and we have held a frank and honest discussion.
"There was an offer to keep me at the club, but in reality the new manager wouldn't want the former manager sitting in the wings.
"I don't think that would have been beneficial and there would have been a little bit of pride at stake too."
Wise's only previous managerial experience was at Millwall, where in 18 months in charge he lead the team to the FA Cup final against Manchester United.
He aims to use his contacts in the game to help him during his stint at the County Ground.
"There are a lot of people I have worked under at all levels, who I can pick up the phone and ask for help if needs be," Wise added.