Bar across the 4th fret, then put the other three fingers down to make the chord
If you dont have the strength in the finger to bar, possibly find a rubber ball and squeze it for ages, and it shall build up strength in your finger.
Fender Special Edition Custom Telecaster FMT HH in Crimson Red
Reverend Sensei HB FM in Tobacco Burst
Fender Vintage C Neck, HH, Surf Green Nitrocellulose (Handmade)

Egnater Rebel-30 MKI Head
Egnater Tourmaster Series 412B 280W 4x12 Cabinet