Hi @alimohd ,
Here’s the [http://h10032.www1.hp.com/ctg/Manual/c06248869|maintenance and service guide] for the laptop, taken from this [https://support.hp.com/au-en/product/hp-pavilion-14-ce0000-laptop-pc/20283999/model/22845489/manuals|webpage].
Go to p.63 to view the necessary pre-requisite steps and then the procedure to remove the HDD so that it can be replaced with a SSD
Here’s a link to just one [https://www.crucial.com/compatible-upgrade-for/hp---compaq/pavilion-14-(models-14-ce000---14-ce099)|supplier] of SSDs. It is only to show what ''SATA SSD'' are compatible with your model and how much they might cost. There are other suppliers online that may suit you better.
Usually there are instructions that come with the SSD that detail how to transfer the data from your HDD to the SSD