Biggest project would be a league two team from England. Which is the fourth tier of English football.
Pick any team you like most. Research teams in the league. Read about them. Look at their kits (jerseys).
Why is it the biggest project? Most countries in FIFA only have one league, some have two, England has 4 in the game. You will be starting from the bottom.
At the end of each season the top three teams, together with the winner of the play-offs between the teams which finished in fourth–seventh position, are promoted to Football League One and are replaced by the four teams that finished bottom of that division.
And that same process will continue in some form or fashion until you make it to the Barclays Premier League, if you ever make it.
So you would be trying to progress from League 2 to League 1, then League 1 to the Championship, and then the Championship to the Barclays Premier League (The top flight in England, where the Arsenal's, City's, Liverpool's play)