I am doing a cross taper off mirtazapine into lexapro any tips?

I have been on mirtazapine for around a year and I’ve hovered around a low dose of 15mg or 7.5 mg and it does not help me so I got prescribed lexapro and instructed to take the lexapro and stop the mirtazapine. But I’m scared about the withdrawals can anyone give any insight on what it’s like and things that helped?