Get a track pump, far easier
Eg Hilka Tools 89506008 High Pressure Cycling Track Pump, Black, Large
View: https://www.amazon.co.uk/dp/B0765FDZM8/ref=cm_sw_r_cp_api_i_NFPVEbWCE5FVX
Ah, I looked at the other one because it was portable, this one looks good too!