relactation tips

my baby girl is 6 weeks old. I breastfed for 2 weeks only. I got really sick and could not nurse her. she's been bottle feed only for the last 4 weeks. now that I'm fully recuparated I would like to bring back my milk supply and breastfeed my sweet girl. I've tried putting her on the breast but her latch is weak and shallow. I've ordered a supplemental nursing system by medela to introduce her back on the breast. just waiting for the delivery box. does anyone have any experience and tips with relactation.