Born in Cúa,[1] Bello began playing football at the age of four, while also playing baseball. Aged 14, he chose the former sport and joined Yaracuyanos FC's youth setup.[2]
Bello made his first team debut for Yaracuyanos on 22 September 2013, starting in a 2–0 Primera División away loss against Tucanes de Amazonas. He scored his first senior goal the following 19 January, netting his team's first in a 4–2 loss at Deportivo Táchira, and finished the campaign as a starter but suffering team relegation.
Carabobo
On 25 June 2014, Bello moved to fellow top-tier side Carabobo FC.[3] After spending his first two campaigns as a backup option, he established himself as a regular in the first team.
Bello scored a brace ain a 3–2 home win against Zamora on 17 April 2016,[4] and repeated the feat roughly one year later in a 5–1 away routing of Zulia.[5] He ended the 2017 season with nine goals and eleven assists, being regarded as one of the best players in the tournament.[6]
Deportes Antofagasta
On 12 January 2018, Bello moved abroad for the first time in his career, after agreeing to a one-year loan deal with Chilean Primera División side Deportes Antofagasta.[7] He made his debut for the club on 3 February, starting in a 2–1 home loss against Colo-Colo.[8]
Bello scored his first goal abroad on 9 February 2018, netting his team's third in a 3–1 away defeat of Unión La Calera.[9] On 12 April, after two goals in eight matches, he was bought outright and signed a permanent four-year contract.[10]
On 28 October 2018, after scoring a brace in a 3–2 loss at Everton de Viña del Mar and celebrating one of his goals by proposing to his fiancée,[11] Bello suffered an injury which sidelined him for three months.[12] He finished his first season abroad with 13 goals in 26 appearances, being the club's top scorer.