Then try sliding your front heel forwards until it can't go any further (picture 3). This is often where people stop when working with hanumanasana. Notice if all of the sensation is in the hamstrings of your front leg, with very little feeling in your back leg. If so, know that is completely normal but ideally this posture is about both legs equally.
So to shift some of the demand into your back leg, try bending your front knee and letting your hips drop a little lower towards the floor (picture 4). Then maybe you will also feel a stretch in the front of your back leg hip. Take a breath or two there then see if that has created space for you to slide your front heel a little further forwards. Keep on cueing yourself to draw your front hip a little bit back and your back hip forwards - don't let your pelvis twist towards your back leg. As with every other yoga posture, don't sacrifice the integrity of the pose (ie keeping your hips square) for range of motion (aka taking your legs further apart).
Once you've reached your limit, grab some support and place it under the top of your front thigh (so not under your bum, under the top of your hamstrings). I've used a block (in the picture at the top of this blog post) but you can use whatever you have to hand to give you as much height as you need. So maybe a bolster, or a pyramid of 3 bolsters stacked on top of each other; a stack of books, one or many firm pillows. Whatever works! Whatever it is, make sure it's stable. Then walk your arms back in towards you and reach them up to the sky. Take a few breaths here: feel your front leg, feel your back leg, and feel upper body reaching up through centre. Then bring your hands to the floor, wriggle out of the posture, and repeat on the second side.
And ask if you have any questions! 🙏🏼✌🏼