Often a new electronic breadboard will be too stiff to insert components or jumper wires. When attempting to insert a wire or lead of a component into a tight breadboard, the wire or lead just bends.
How to Insert Components into a Stiff Breadboard
Use a pair of pliers to hold the wire or component lead before inserting it into the breadboard. Take the lead or wire as low down as possible and use the pliers to push the lead into the tight breadboard hole or tie point.
See the article on how to insert a component into a stiff breadboard, which contains more details. The article also has photos and a video which shows exactly what to do.