To get your B12 up, you need to eat animal based products, so milk, eggs, cheese and yoghurt. it is VERY important because low B12 leads to serious anaemia, extreme fatigue, muscle pain, joint pain, disorientation, confusion, clumsiness, burning pins and needles in feet/legs/hands because of nerve dysfunction, mania, paranoia and a whole load more. If it isn't addressed, you can end up with permanent brain and CNS damage amongst other things.
Your doctor can arrange a loading course of B12 injections if the deficiency is serious, you get 6 over 2 weeks and then one every 2-3 months after that (I am well versed in this little joy, am a veggie with pernicious anaemia))
Folates are in dark green veg, black eyed peas, lentils and things like that. Also in fortified bread and breakfast cereal.
You should start your day with a fortified cereal with milk, wholemeal toast and nut/seed butter with orange juice. That addresses your deficiencies.
Lunch could be something avocado sandwiches on wholemeal bread, lentil pate on toast, spinach and butter bean soup, cheese and tomato omelette, wraps with bean salad and dark green leaves (rocket, baby spinach and the like), hummus and pitta breads with salad.
Dinner could be jacket potatoes with beans and cheese, spinach, lentil and potato curry with naan bread, broccoli bake ( cooked broccoli, onion and cooked rice mixed with cheese sauce, topped with cheesy breadcrumbs and baked until golden), mac and cheese with peas, pasta in a tomato sauce topped with cheese and served with salad, bean chilli and brown rice, eggs florentine on wholemeal toast, quiche with cabbage and carrots, roasted beets with onion and feta, carrot, beetroot and orange soup, roasted veg with halloumi, paneer and spinach/okra curry with brown rice, savoury bread and butter pudding with broccoli and cauliflower, asparagus and pea rissoto.
Have yoghurt, citrus fruit, strawberries or wholemeal bread with nut and seed butter as snacks.
All of the above have B12 and folates, are quick, easy and cheap and should give a good balanced diet.